I got a new TV a few months ago. It's possible to get 144hz at 4k, I think, but I've never encountered a game that goes that high. Home on the PS5 will display in 4k, but it's only 60 hz. The Xbox home does 1080p in the menus but 120hz. You need higher end cables for 144hz at 4 or especially 8k, but that's like HDMI 2.3 or something. Point being you'd probably be hard pressed to find a game that goes that high. I think you could say it's a 4k 144hz system on paper only kinda like how Xbox touts 8k on the box.