4K Bluray disc coming in 2015
Aside from Atmos, this technology will be one I will invest in when the television manufacturers(and projectors as well) catch up with hardware. For me, without 4K Bluray disc(which addresses some of the issues I have with current 4K sets - Dolby Dynamic contrast, Rec 2020, widespread adoption of HDMI 2.0 and HDCP 2.2) there is no chance of progress on the manufacturers side without all of these issues addressed.
4K Blu-ray discs arriving in 2015 to fight streaming media - CNET
4K streaming is going to happen, but not without the cable and Telecom companies fighting like hell on bandwidth issues. Netflix which will be the first to offer 4K streaming will probably have to pay both for the necessary bandwidth to get it to the consumer. And the consumer will probably have to pay a premium for access to those/that stream.