make Model C (same as model A - but with Wifi or Bluetooh for network and 2 x webcamera - front and bottom side - for Skype for example) as portable game handheld for education. Kids loves portable game handhelds, iPADs or ANDROID mobile phones - simply small portable devices.
Plus they will need have no keyboard and LCD in their classroom. So it will save workplace for students notebooks, sketchbooks, coursebooks etc etc... And teacher can have Model B with keyboard and LCD as server for online educational software or online test/exam program...
And you can use displays from mobile phone industry in that handheld version (very cheap and mass production) and still keep HDMI as TV-Out (watching family photos on TV for example).
I can imagine kids or even college students using R-Pi Portable for learning
or watching movies or learning music with cheap MIDI USB keyboard....
And I am sure that handheld version will be very popular in electronic musician scene (Music Composers, DJs, VJs, Video Artists etc etc).
Maybe 70 - 130 USD for 700Mhz game/learning handheld will be super cool price...

I mean something like this:
Here is never realised game multimedia handheld (vaporware) by Korean company Gamepark...
What you think about this idea for future R-Pi´s???