Flip phones may be somewhat on the outs these days (at least among those demanding the latest and greatest), but they may well be the key to future 3D cellphones -- at least if this Motorola patent application is any indication. The basic idea is actually a fairly simple one: you'd see a regular 2D image on the screen when the cover is open, but when it's closed you'd be able to look through the transparent lid and see the images with a "three dimensional appearance." As you can probably figure out, that screen would be a touchscreen that takes the place of a keypad, and another illustration also shows that the same idea could be applied to a slider phone. Of course, what the illustrations don't show is how effective that three dim
