I have an illium stills camera - it's pretty limited as a normal camera (2.5k by 1.5k 2d image res, needs a lot of light, built in lens, big) but fascinating in possibilities. So I don't think assuming this technology is just about fixing shots in post is fair. For example, with the illium camera image, the software lets you create a video where you fly around the image changing focus and perspective as you progress. It's like a distant cousin of bullet time and a really interesting effect. You can also have multiple things in focus that shouldn't be (in terms of how your eye sees). So imagine each frame of your film offering up those things - not to fix a missed focus (you don't really focus light field stuff that way - you have to think in terms of focus depth range, where you want the centre of that range...) but rather to do things dramatically in your final output of the scene that other technology can not facilitate. Doesn't particularly make it better or worse - just different if you allow yourself to think creatively.