Hi all -
I'm sure we are not alone in this vision but I think a lot of these devices (tablets) would sell in 2010.
-  Basically just make the iphone but bigger
 - Remove the dialer but keep the wireless
 - Support syncing, like iphone if wanted
 - Make it notepad size, 8 x 11.5 with a iphone-like multi-touch screen
 - Portion (or all) of the screen is see-through capable for scanning, camera, identifying things in the environment, etc
 - No hard keyboard only soft; all screen except simple buttons
 - Make it a windowed and allow multiple apps to run at once
 - Have ALL iphone apps be usable - presto 100,000+ apps
 - Increase processor speed and RAM capacity accordingly
 - Hit the $1000 price ceiling and drop to $800 in 12 months
 - Include character recognition so you can write on it
 - Bluetooth with the iphone to provide co-joined devices - one device could leverage the other in functionality including phone, processor, RAM and display.  Make the two devices extend each other.  Build from iphone, not from Mac.
 - Include following ports: Ethernet, two USB 3.0, cinema display, headphone
 - Include camera with two lenses - one front, one back
 - Include microphone and speakers
 - Not a PC, not a Mac, not an iphone, not a cheap notebook -> convergence
 
And others have also had this idea.