The videophiles on here are not going to be satisfied with The Cloud. As Jam and XenonMan point out, physical media are the only source of best quality video. Yes, providers will compress every bit of content possible while still claiming 1080. The huge issue that is being touched on here, but not discussed, is the bandwidth available (internet download speed) here in the U.S. To increase that significantly, even to equal the best avialable in other parts of the world, much less to get to 4K, would be a monumental cost (new satellites and other infrastructure). No studio, or all studios together, or a provider or all providers together have enough money for that.
Hank's wild guess: one entity has enough money to attack this: Apple. Apple never leaks its next big play - could it be Apple iCloud Infrastructure? Maybe an additional investment by Amazon?

Now back to reality...