Yep once you have experienced proper HDR then it is hard to switch back for sure, some of the top LCD TV will have even better HDR than OLED but cant quite match the pretty much instant (0.1ms) response time of an OLED which makes it pretty much perfect for playing games on ... even the best gaming monitors cant match this TV in that regard
The only benefit i get from playing on my monitor and which is actually noticeable for me is the ppi between the 2 sizes ( 163ppi/27" vs 57ppi/77" ) so the monitor will look quite a bit sharper but would still rather play on the CX any day of the week as the HDR improves the picture so much . Monitors need to do a hell of a lot of catching up in this regard, to this day I've not seen a monitor with impressive HDR that doesn't cost nearly twice the price of a 48"CX
Once all the bugs are ironed out of Windows 11 i will be doing the change over as from what i have seen they are implementing that auto HDR mode that upscales SDR games to HDR and by all account does a very very good job at doing so . looking forward to that once like Far Cry 6 it comes out of Beta phase