Indie Film Makers and 4k, is it right for us yet?

I guess like most of you I am constantly considering what gear I should be using for my film making. The mass of options now for 4k makes this the current big question. I must say I am waiting to see if Sony follows up on its recent releases with an A7s Mark II.

In the meantime, I found this interesting article and a video from Sundance on this very question.