4K is a new realm, so that's tough to answer. I think the dominant company in this technology is going to be the one with the most CONTENT. Their website looks like HULU when it first started out. At the time, I looked at it and said "there's nothing I'm interested in watching on there, I'm not paying $8/month for this." But now, HULU's got all kinds of shows and some movies and I watch it all the time. Ultraflix just needs the content, then maybe some day they'll be big like Netflix. Check out their price; for even a fraction of that I would never have to work again.