Efficiency in computing project/Brainstorming

Suppose we wanted to have a power device, that was efficient. Powerful, but efficient...

What would that look like? ....

GPU/multicore....


 * A device... lcd/quasi epaper (glare free) on one side
 * solar panel on other


 * wifi...


 * memory...
 * usb... maybe..
 * processor...
 * power on off button...
 * speaker...
 * camera...
 * weather resistant..
 * microphone...
 * linux...


 * blue tooth..


 * accelerometers..
 * gps


 * hmmm... ... ... .. ..



wimax? cdma?


 * light - thin - maybe ~8 x ~6 x =<.25


 * durable>