Spider Projection Computer for Cloud vs OLED and AMOLED?

One of these days, a projection computer like this will be feasable. Afterall, any white paper surface can reflect both the display and keyboard. But with AMOLED and OLED technologies speeding up, you may not ever need a projection computer. Afterall, you're going to need massive battery power to project light strong enough to work in daylight whereas OLED displays actually save energy while being brighter than anything on the market now.

via http://www.yankodesign.com/2012/03/13/get-a-spider-for-cloud-computing/