I'd love to have a laptop with a changeable screen (press the button and pop it out): normal and eInk. Or even: eInk, Glossy, Matte, very high-res, etc... It could also be a fun DIY project to take an eReader and add a video input, put the tablet in front of your screen and connect it to the DVI or whatever video port of your laptop.
Understanding is always the understanding of a smaller problem in relation to a bigger problem. -- P.D. Ouspensky