The Lytro might be the new gimmicky camera du jour (and that's cool, because it looks awesome), but the Polaroid was the original gimmicky camera with its print film that developed into photos instantly. Surely people had trouble wrapping their heads around this in 1972.
You've got a Flip cam and plenty of Hipstamatic filters to get you through your photographic day-to-day. But there's nothing like the experience of a Polaroid. And it's coming back, thanks to the skillful refurbishing of Impossible Project and Photojojo.
The Polaroid SX-70 was not the first instant camera. Released in 1972, it was the first instant SLR, and the first to use Polaroid's iconic integral print film that developed automatically. It folded up so it fit in your pocket.