From the 2008 Consumer Electronics Show: Microvision demoed a "pico" projector. This tiny piece of electronics can be embedded in just about any type of device from cell phone, to PDA, to laptop. I think video is a killer application in education and training. Imagine not having to lug around even a portable projector and being able to deliver a video to a small group anywhere, anytime. Really opens up all sorts of possibilities for mobile or m-learning.
Video and potential applications follow.