It doesn't matter how it's represented internally. The end goal is a digital photo that you will print or post on facebook/flickr.
What I don't get it who their market is. If you aren't taking serious photos, nobody really cares if it's perfectly focused. And I doubt pro photographers will want it because of the low resolution.
I don't think it's about getting print resolution or perfect focus.
The idea seems to be to add a playful kind of interactivity to photos. With their Facebook app, you can click around a photo and "discover" different views. "Look, there's Mark in the background. What is he doing? I didn't even see that before..."
I don't know if it will be a success, but I really like this concept. It's sort of like Instagram but with amazing science behind it.
"Light Field Resolution: 11 Megarays: the number of light rays captured by the light field sensor."