Eh, I kinda of agree with you, but not for the reasons stated. I mean, I don't see visuals stopping to significantly increase in quality. Look at our current games... they may look good, but they're also far from current CGIs. We still have a hard time making games that look as good as early 2000's animation movies.
If visuals get stagnant, this will probably happen after the 10th generation, but I'm sure this won't happen. Cause, you know, there are always many things to improve even if the visuals cannot anymore; like seamless gameplay (loading free), bigger amount of NPCs on screen at the same time, bigger and more detailed worlds, more destructible enviroments, etc.
Bet with Teeqoz for 2 weeks of avatar and sig control that Super Mario Odyssey would ship more than 7m on its first 2 months. The game shipped 9.07m, so I won
