Rec.2020 & HDR

So I’m curious, I got a TV that has HDR support that was added in a firmware update, and I don’t think the HDR is actually doing anything, to me it looks like an adjustment you could do in Photoshop rather than any higher range, and I can still see banding in movies. Has anyone else had a better experience where you could notice a difference? If it actually does something then maybe someday I’ll upgrade to a current model.