Note: Much of the information here is as of 2012

See Tablets under Technology

See the eReader page for kindle, nook, ...

I've started including the phone-tablet hybrids (5-6" devices) here.

Note: Many new tablets were announced at the 2011 Consumer Electronics Show (CES), in Las Vegas. Google's Android OS was the most popular but there were devices with the Chrome OS and Windows 7.

As of March, 2011 the consensus was the iPad (now out with version 2) is still the winner.
The android devices have only a fraction of the apps optimized for tablets and have been buggy. They also seem to be expensive relative to the iPad.
In January, 2011 comscore announced that android phones accounted for 31% of the smartphone subscribers compared to 25% for the iPhone. Apples share may improve with their recent addition of the Verizon iPhone.
I think the android tablets will improve, but being spread across multiple providers (Samsung, Dell, Motorola, Toshiba) they will not have the buying power for components that Apple has.

2013 - Market

2013 - Devices
Model Size resol
(px)
PPI OS CPU Video
player
RAMCamera
New Nexus 7 7" 1920x1200 323 4.3 1.5Ghz quad-core Snapdragon S4 Pro Full HD 2G 5MP
Sony Xperia Z Ultra 6.4" 1920x1080 334 4.2 2.2GHz Snapdragon 800 Full HD@30fps 2G 8MP
Samsung Galaxy Note 3 ? 6"? 1920x1080? 267 4.3 Snapdragon 800
2011-12

Model Size resol
(px)
PPI OS CPU Video
player
Camera
202 Samsung Galaxy Note 5" 1280x800 285
Samsung Galaxy Note 2 5.5" 1280x720 267 4.0 1.5GHz Exynos four quad processor Full HD@30fps 13MP
204 Nook Tablet 7" 1024x600 170
205 Amazon Kindle Fire 7" 1024x600 170
206 Lenovo Ideapad A1 7" 1024x600 170
207 HTC Flyer 7" 1024x600 170
Nook Color 7" 1024x600 170
Samsung Galaxy TAB 7 7" 1024x600 170 2.2 1.06GHz Full HD@30fps 3MP
Samsung Galaxy TAB 7 Plus 7" 1024x600 170 3.21.2GHz dual-core 1080p@ 30fps 3MP
Samsung Galaxy TAB 2 7.0 7" 1024x600 1704.0 1 GHz Dual-Core Full HD@30fps 3MP
Samsung Galaxy TAB 7.7 7" 1280x800 196 3.2 1.4GHz dual-core 1080p@30fps 2MP
Samsung Galaxy Tab 8.9 8.9" 1280x800 170
Sony Tablet S 9.4" 1280x800 159
Acer Iconia Tab A500 10.1" 1280x800 149
ASUS EEE Pad Transformer 10.1" 1280x800 149
Lenovo Thinkpad Tablet 10.1" 1280x800 149
Toshiba Thrive 10.1" 1280x800 149
Apple iPad 2 9.7" 1024x768 132
New Apple iPad 9.7" 2048x1536 264
Google Nexus 7 7" 1280x800 216 4.1 1.3Ghz quad-core Tegra 3 1080p@30fps none
iPad mini 7.9" 1024x768 162  A5
Source: AllTouchTablet.com

Reviews:TechRadar | c|net

Screen sizes on NetBooks and Smartphones:
An Asus 10.1 in Eee PC 1015PE netbook is 10.3x7.1x1.5 2.7 lbs with a 1024x600 display.
13" MacBook is 13x9.1x1.1 4.7 lbs with a 1280x800 display.
An iPhone 4 has a 3.5" 640x960 display, A Droid X has a 4.3" 480x854 display

† Costs:
I can get a Samsung Galaxy Tab from Verizon for $200 with a $20/mo. 1GB data plan.
The net present cost of $20/mo for 2 years at 4% (Rate on my home equity loan) is $300.
So the total cost is $500.
I can get the Tab without a data plan at BestBuy for $430
I can subscribe to the data plan on a month to month basis, but it costs an additional $35 each time I re-initialize it after disconnecting.


Consumer Reports:
9-12 inch
the 4G iPad and Samsung Galaxy tab 8.9 got scores of 83-85
The Asus Transformer Prime and iPad 2 got 82's
The Wi-Fi only Samsung Galaxy tab 8.9 and 10.1 got 80-82
Acer Iconia Tab A700   80
Lenovo IdeaTab S2109    80
Motorola Droid Xyboard 10.1  79
Toshiba and Sony got 79
Acer and Asus Eee Pad got 75's

7-8 inch
Samsung Galaxy tab 7.7 got 79
Google Nexus 7  (no camera)  got 79
Samsung Galaxy tab 7.0 got 72
Samsung Galaxy tab 2 7.0 got 76
Toshiba Thrive 7" got  69
Amazon Kindle Fire got 66
B&N Nook               62

2010-2011 Models:
Preliminary review:
Mfg./Model cost screen
size
in
resolution dimensions * comments cnet
iPad 2 $500 9.7 1024x768 9.5"x7.3" iOS 4, Assisted GPS1 4
Motorola Xoom $800 10.1 1280x800 9.8"x6.6" Android 3.0 3.5
Samsung Galaxy 10.1 $600 10.1 1280x800 Android 3.1
Samsung Galaxy tab $500 † 7 1024x600 7.5x4.7 Android 2.2, GPS 3.5
Toshiba tablet 10.1 1280x800 ? Android, GPS
Toshiba Win 7 tablet Available 2nd half of 2011
HP TouchPad 1024x768 ? Web OS
Eee Pad MeMO 7 1024x600 ? Android
Eee Pad Transformer 10 1080x800 ? Android
LG Optimus Pad $450 8.9 1280x768 9.5"x5.9" 3D camera, Android
HTC flyer 1024x600 Android
LG Optimus Pad $450 8.9 1280x768 9.5"x5.9" 3D camera, Android
Dell Streak 7 $200 7 800x480 7.9x4.7 Android, T-mobile 3.5
BlackBerry PlayBook $499 7 1024x600 7.6x5.1 16 GB, QNX RTOS2
Unless noted otherwise all have 1GHz dual-core processors, with 32GB of internal storage and connectivity via Wi-Fi, Bluetooth, and 3G.

* A suit jacket pocket is typically 6" wide by 7.5" deep.
My casual jacket pocket is 5x6. My soft shell and fleece vest pockets are 8x6, and my fishing vest front pocket is 7.5x4.7 .
The back pocket on my Gregory backpack is 7.5 x 10.

1. Assisted GPS (A-GPS) - A GPS system that uses network information (e.g. cell towers or WiFi location from a database of IP addresses) to help the GPS acquire satellites faster.

2. QNX Neutrino RTOS - A is POSIX-certified OS. POSIX is the Portable Operating System Interface [for Unix].

Camera Resolution:
 Phones
  iPhone 5               8Mp
  Samsung Galaxy Note 2  8Mp
 Tablets
  3rd gen iPad   5Mp
  Galaxy Tab 7   3Mp
  Nexus 7 tablet 1.2 Mp
Links:
Retina Display iPad vs. e-ink Kindle: Which do I prefer for reading? | Crave - CNET
Android Tablets
About tablets in tech/tablets (Apps, Market share, ...)
Tablets rated | TechRadar
Kindle vs. Nook vs. iPad: Which e-book reader should you buy? | Crave - CNET
Android OS and Version History
Mobile Device History
Tablets Reviews | The Verge
The 10 best tablets of 2011 [UPDATED] | TechRepublic
Best Tablet Computers | Top Picks and Reviews at ConsumerSearch
Tablet Display Technology Shoot-Out 2011
AllTouchTablet.com
  Best Tablet PC Reviews
  Tablet PPI (pixel density) resolution comparison chart
Styluses
Know your tablets | iPad Atlas - CNET Reviews
Best Tablet, iPad Or Dell Streak Or BlackBerry PlayBook Or Motorola Xoom?
Google Chrome OS Vs. Android Vs. Windows 7 : Online Social Media)
Apple vs. Barnes & Noble: Game Not Over | Analysis | The Mac Observer
Tablet showdown: Motorola Xoom Vs. LG Optimus Pad Vs. Samsung Galaxy Tab 10.1
Tablets - Apple ipad 2 VS Motorola Xoom VS LG Optimus Gslate VS Samsung Galaxy Tab : Ranjith Siji
Accessories

last updated 2 Aug 2013