You know how on a computer screen you can just drag any corner of a window to resize it? I had a dream once where I had a phone that worked that way. Want a bigger screen? Just drag one of the corners of the phone. Shove all the corners together and drop it in your pocket.

I used the hell out of that phone all night. Then I woke up and spent about an hour trying to figure out how to build one. I think I could do it in one dimension (i.e. make the phone wider) by rolling the screen around a tiny roller in the edge of the case, and having the case telescope. But that won't work in two dimensions at once. I never figured out how to do it in two dimensions.

When somebody builds one of these, I'll buy one.