It sounds like you're waiting for specific 4K HDR content as there's tons of 4K HDR content already that's easily accessible. Also, the same concept I applied to HDMI 2.1-capable sets' proficiency in displaying content that doesn't require that spec also applies to 4K HDR sets. A TV that is proficient at 4K HDR is inherently going to be excellent when displaying normal HD content. My "placeholder" 55" is just OK at HDR due to limited max brightness, but Blu-rays, games and other HD content look absolutely fantastic on it. It's not a bad thing to have a TV that has capabilities that exceed the fidelity of the source material. I don't see the need for content requiring a certain feature set as a compelling reason to hold off buying a TV that supports that feature set if that TV is also better at displaying content that doesn't require that feature set.