Question: can hdr be added to a tv?
Answer: Problem no. TVs are only as smart as they have to be. Most are slow and stupid. There's no need for a non-HDR TV to be able to process a 10-bit HDR signal, so it can't. ... But let's say a TV is HDMI 2.0a, and it can somehow can be upgraded via firmware to process a 10-bit signal, there's still a much bigger problem.