Wanna know what every college kid will want for Christmas? Not a new laptop, not a tablet, not a new smartphone. They're going to want this first-of-a-kind gadget, 3M's handheld battery-powered DLP projector that streams content from Roku. When's the last time a projector was exciting? Hell, I want one!

Raise your hand if you've ever used a projector camera or projector phone for anything but failing to impress people with the fact that you have a projector camera or a projector phone. Okay, if you have your hand up, use it to smack yourself for buying a useless gimmick, and then start praying that this projector viewfinder idea will actually happen.

Cellphones have been tacking on a lot of new features over the last handful of years: touchscreens, 3G connections, forward-facing cameras, HD video recording. Projectors being widely available on cells is often looked at as what's next, and this unit could make that possible.

Boy, something like this would have made class a lot more interesting — and musical. Blair Neal's "Color a Sound" uses transparent sheets (just like teacher used to use) sliding across an overhead projector to act as sheet music, while...