Yeah, we've chewed-over this a bit in the last couple months. Some think the technology could evolve into something useful; right now it seems meant for Facebook pix and may be targeted to fone.cam applications. It seems to need a 20pmx sensor to produce a 2mpx image. Yow.
There are alternatives. Samsung patented a two-lens two-sensor system, one taking an infinite-DOF shot, the other a blurry shot, with software blending them for the desired focus. IMHO this could be done with just one lens+sensor: shoot sharp, make a blurred copy, blend as desired.
I apply the same test to the Lytro as I do to claims of paranormal goodies like water-witching and zero-point energy: if they worked as claimed, greedy capitalists would exploit them massively. If the Lytro concept really worked, some megacorp would have gobbled it up. Oh well...
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