The idea of light field photography, according to this article, goes back to 1936! [
graphics.stanford.edu]
I think it's pretty cool and would be inclined to try one out if the price tag weren't so hight right now. For that kind of money, I can get a very decent pocket camera or even camcorder, more useful to me for family stuff right now. Someday, though, I could see having one of these to tinker with... especially when they can drive the focus in an iPad-compatible viewing app.
- M.