FWIW i think it's possible. The question is whether it's within our lifetime.
There's an upper limit to what's useful - the real world. If our minds can't comprehend it, you've hit the upper limit of practical use. Once in game graphics become literally indistinguishable from real life then we'll start to plateau in terms of complexity of "tricks" and raw computing power will be able to catch up.
> Once in game graphics become literally indistinguishable from real life then we'll start to plateau in terms of complexity of "tricks" and raw computing power will be able to catch up.
Maybe. Alternatively games won't actually want to render photorealistic and will want to render with varying types of stylized graphics. Is that easier or harder? Probably a little bit of both.
We actually are at a point where we can real-time render photorealistic scenes... for certain types of objects. Primarily static environments. Photogrammetry is basically cheating, but it is highly effective! Mandalorian is famously filmed on a virtual set and it's cool as fuck.
Graphics is moving rapidly into physics. We might be soon be able to render photorealistic scene descriptions. However simulating the virtual world we still have a long, long ways to go. By simulation I mean everything from the environment (ocean, snow, etc) to characters. We most definitely can not synthesize arbitrary virtual humans.
Will we someday see a movie that _looks_ like a live action movie but is completely virtual? Oof. Maybe? But even if we could, would we want to? I'm not sure.
There's an upper limit to what's useful - the real world. If our minds can't comprehend it, you've hit the upper limit of practical use. Once in game graphics become literally indistinguishable from real life then we'll start to plateau in terms of complexity of "tricks" and raw computing power will be able to catch up.