AFAIK the HDR-10 standard is nothing more than a minimum requirement for contrast and total brightness, along with 10 bit colour capability. My monitor meets the specs for HDR-10, so when games start supporting it I'm going to be pretty pissed if that colour mode won't activate due to my monitor not having some stupid certification. 4K HDR at 100Hz+ is going to require too much graphics power pretty much forever. As always I'm waiting for a 1440p HDR 120Hz+ screen, which implies it'd be at least as colour accurate as an IPS. Competitive games is where it matters, and hitting high frame rates is usually possible in those. CS GO, League of Legends, Overwatch, etc can actually be ran at hundreds of frames per second.