HDR makes a bigger impact on things than 4k. I didn't go the OLED route this time around for a number of reasons - but my Sony XE93 with that beautiful 1000 nits brightness with HDR makes things come alive. When you see those contrasts between the blackest blacks and brightest brights.
I've experienced both HDR10 and Dolby Vision (the latter with something like Altered Carbon is just something amazing).
This is with streamed sources and PS4 Pro gaming, so god only knows how stunning it would be if I have a UHD player.
Yes this is my experience too (no Dolby vision though). It’s interesting that the Oled owners (not all) don’t seem as impressed. Never gamed on an oled in hdr but wonder if I’d find it a bit lacking after being used to 1400 nits peak brightness? Who knows and I’m sure if I had an oled I’d be blown away by it. Don’t want to start this into any silly my c*cks bigger than yours type post though. Merely just surprised that some with an oled aren’t seeing the massive difference when gaming between the same game in hdr and sdr.