The magical science of Lytro’s in-camera technology called light field photography aims to bring your photos alive and interactive by being always in perfect focus at any point you want:
The way we communicate visually is evolving rapidly, and people’s expectations are changing in lockstep. Light field cameras offer astonishing capabilities. They allow both the picture taker and the viewer to focus pictures after they’re snapped, shift their perspective of the scene, and even switch seamlessly between 2D and 3D views. With these amazing capabilities, pictures become immersive, interactive visual stories that were never before possible – they become living pictures.
As exciting as adding one more technological capability to the camera may be, such as removing the pesky element of perfectly directed focus (which can be done with Lytro in post-production), it seems this will not be helpful to all. I see this technology as a new tool to help make great photographers take even greater pictures more quickly and more easily. But sadly, this new technology might not be as helpful to all other photographers.
Focus happens to be only one of those things in the entire art and craft of photography, not the only thing. This technology might help get the perfect focus on any part of the picture, but it will not help sharpen the focus of one’s vision.