I may be ignorant but I don't know of any other UK content provider who is providing 4K streaming content.

I think there is a massive reluctance on the part of companies to stream this type of content. 3D TV demonstrated the need not to believe the hype and is considered a failure. They don't want to be burnt again.

4K has a major bandwidth issue that cannot easily be overcome by national broadcasters without sacrificing multiple channels, that is, content.

Somebody like Amazon can bring this on board without having an impact on their business.

I recently went into Richer Sounds (hi-fi/tv specialist) and although they had 4K screens for sale, the moment you mention that the standards haven't been sorted yet. they agree it's better waiting a couple of years.

Anecdotal evidence from my wife is that she can hardly tell the difference between 480 and 1080p content let alone going to 4K. I think selling it to the public is going to be hard. Harder than 3D TV.

I'm guessing you may need 4K at around the 50" screen width to begin appreciating it.

On a side note, I do believe 4K 39" displays have a place in the workplace. Waiting for a cheap one with a minimum 60hz refresh rate to come on the market.