Back when I started this thread, my opinion was that it would be 2 years before physical media 4K content, in the form of 4K Blu-ray, became widely available and I was wondering what to do in the meanwhile. My opinion is now fact. In the meanwhile, we have gotten one current commercially available 3D sound format (Dolby ATMOS), with the prospects of DTS and AURO commercially available concurrent with 4K Blu-ray. I answered my question by purchasing a Sony XBR-79X900B in the brief moment in early summer when it was on offer at a $1.5K discount. I'm really happy that I did because I've had many months of truly superb picture quality with the Sony's excellent upscaler. The big picture shows detail that was obviously in the original 1080P blu-ray recording that I simply couldn't see on a smaller screen and the 4K pixel density means that I don't see any SDE fuzziness that is apparent on the 80" Sharp 1080P display, for instance. Turns out that HVEC H.265 is necessary in the short term to get Netflix 4K and I certainly hope that over the next 2 years Netflix increases it's 4K offerings. HDCP 2.2 not a near-term necessity, but will be for 4K Blu-ray. So, my interim choice was a good one and I'm now content to wait for the 4K Blu-ray spec to be finalized and all the 3D audio formats to be commercially available. On my streaming services, I'm lucky to have 5.1, let alone 3D audio; so a physical media is going to be necessary. When I upgrade in a few years, I'll be able to get a reasonably-priced OLED or microdot LCD display perhaps capable of 12-bit 4:4:4 color, a 4K Blu-ray player, a new 3D audio Receiver (to replace my Yamaha RX-Z11) and I'll be able to do that with full knowledge of what flavor of 4K video connector (HDMI 2.1?, Displayport?) will be necessary in the Receiver, what kind of HDCP will be needed, and what the chroma capabilities of the display will be.