On Wednesday, March 25, 2015 at 1:52:13 PM UTC-4, wrote:

Only film/TV studios are shooting in 4K. It'll be a long time before we have 4K TV's in our homes, as the cable companies only recently upgraded their systems to handle HD.

Cable? TVs?

I agree that you need to have a specific reason to shoot 4K, like for example frame grabs for magazine covers (aka still photography extracted from a video stream).