It's more a tongue-in-cheek reference when Sony was touting Full HD 1080p with the PS3. Yeah, it could do it, and some games certainly did. But it was more often than not where games were below 1080p, some at max 720p.
"This time...we really mean it!"
To me, 8k is a fool's errand for gaming in general, and it's not easy for me to say that. The jump from 480p to 1080p was absolutely massive, and it felt massive. While 1080p to 4k is a big jump for sure (4x resolution increase), a lot of that has more to do with the additions of HDR, Wide Color Gamut, VRR, etc. All of that can exist on a 1080p panel, and look fantastic.
It also didn't help TVs made the leap from 1080p to 4K rather than have a stop-gap to 1440p like what Computer monitors have used for years, and still continue on a regular basis. Now they want to continue that same leap in resolution-a 4x increase, from 4k to 8k, and who knows when we'll have our first 16k resolution TV.
Call me old fashioned, or whatever, but this constant chasing for more and more pixels, and higher resolutions are going to taper off, and probably sooner than later.