Since a few years the size of a cell phone is determined by a balance between a compact mobile design and and the comfort of a large high resolution screen. You can't have both. Till now. We've seen concepts of roll-out screens before but Texas Instruments
now shows us a cell phone with in-handset projector. The technology is still very much in development but changes are that, just like the cameras a few years ago, a built-in projector will be standard in future phones. The video below shows the projector in action.