Humor me, as I take a possible look 2-4 years into the future. I don't know if all this technology is viable, but wouldn't be nice:
Consider, pico projectors can be powered by an LED or laser light source. Now imagine an iPhone type device (or an iPhone - which is probably the projector engine manufacturers dream deal), equipped with a laser based pico projector. Now let's split the laser for multiple simultaneous functions:
One beam can be used to project the image onto a screen or wall, a second beam could be used to project a full sized keyboard, and a third beam to scan that "keyboard" area for "interference" caused by fingers passing through the virtual keyboard. All of a sudden, the iPhone - already as powerful as many laptops, now has a full sized keyboard, and an 8 to 30 inch projected image (with decent brightness).
Which means - who needs a traditional laptop anymore?
It's no wonder some of the industry forecasters are projecting total pico sales (pico projectors and pico projector engines that will go inside other devices) of 15 million units or more in 2012, just three years off.