Originally Posted by NintendoManiac64
4k 60Hz 4:4:4 8bit, which HDMI 2.0 is fully capable of, uses the exact same amount of bandwidth as 4k 120Hz 4:2:0 8bit.
Also quite a few 4k TVs support native 120Hz input at 1080p, and some even support it at 1440p.
It's very rare to find TV's that support 4K 120Hz 4:2:0 8Bit. Most TV SOC's simply don't allow it. It's not a matter of just meeting the bandwidth limits of HDMI 2.0 but also insuring the TV SOC has support for it without locking the user out completely.
As for 120Hz 1080p and some (rare) 1440p numbers I've seen they all go over 8.33ms. There is still room for improvement!
Now if people are happy with 120Hz 1080p on their sets that's fine, but I want full fat 4K 120Hz 10Bit native inputs with support for VRR which HDMI 2.1 will allow along with the new SOC's Mediatek and other vendors are working on for mass rollout in high end sets next year.
Some of these features like VRR, etc can be implemented in current HDMI spec the new Samsung is rolling it out, however I sadly doubt most other manufacturers will enable it in a future firmware update...I hope so though since Manufacturers should do everything in their power to deliver the best exp to the buyer and after purchase support. An area I can point to where many owners have felt let down in the past.
I'm hoping a lot of these "hopes and dreams" become reality next year, but being in the high end display game for so long I know it might take a few more years before we even see everything I'm requesting. Progress is slow till one day it meets your needs and you move on to something else to attain.