This thread is consistent with my feeling that the hardware is light years ahead of the available source material.
When 4K television came out, I remember scratching my head that the source material that I watched still hadn't caught up to 1080p hardware. Everything was transmitted as 720p, except for a few on-demand 1080p movies, and even some of those were suspect.
I could go into Best Buy and watch 4K in all its glory, fed by a proper 4K loop, and sure, it's fantastic. But that not the reality. The reality is poor consumers with nice 4K TV's watching 720p compressed sources, at best.
What happened to 1080p? Why were the sources never upgraded to offer everything we watch in 1080p, so we could take advantage of our nice 1080p TV's? It never happened.
I can load a 1080p Blu-Ray disc into my player at home and it produces jaw dropping clarity on my 1080p television. A lot better than any compressed 720p source fed to a new 4K television.
All this new 4K hardware is basically a money maker for manufacturers. It does little to nothing for the consumer in my opinion.