Lytro Warm-Up.

1) When i clicked the picture i saw that the spot i clicked, refocused. 

2) The Lytro, takes in the entire light field when you snap a picture, allowing you to refocus later.

3) I think the photographer would have to know a lot about aperture, shutter speed & ISO. 

4) In my opinion yes, it seems like cheating in away but i do think it's really cool, also it is more advanced and still less expensive than a regular DSLR camera.