GPU tech is advancing rapidly.
But I can still play brand new games on my 6 year old PC, which is only barely noticeably slower than my 2 year old work PC. And I wasn’t anywhere near top of the line then. Also because PCs are components if I really wanted to jump my PC’s speed I could do it with a new GPU card. Performance per watt really isn’t going to drive the market, that’s a nerd stat that doesn’t have that much to do with what I see on my screen.