If I take a photo, I'm not going to distribute the image in a proprietary format to allow refocusing. That leaves using it as a way to fix mistakes -- which, as you become better at photography, become less worth it.
Light-field cameras might gain ground in the future, but photographers can be a conservative bunch. The current top of the line professional cameras are astoundingly similar to the film cameras they replaced, and not for lack of manufacturers trying.
If I take a photo, I'm not going to distribute the image in a proprietary format to allow refocusing. That leaves using it as a way to fix mistakes -- which, as you become better at photography, become less worth it.
Light-field cameras might gain ground in the future, but photographers can be a conservative bunch. The current top of the line professional cameras are astoundingly similar to the film cameras they replaced, and not for lack of manufacturers trying.