I agree with you on the prediction. I disagree on the implications.
Sony alone is not capable of influencing a large chunk of the market to design their games around their consoles specs as the "base spec" of sorts. If they launch an ultra powerful PS6 with no weaker versions, the console would still be held back because the vast majority of players would still be playing on popular weaker systems like the PS5, Switch 2, weaker gaming PC's, Xbox Series and mobile phones. PS4 and Switch 1 also might continue to be supported by some smaller developers for a while. The industry is gravitating towards weaker hardware due to diminishing returns, high costs, and a high percentage of low-end hardware gamers. Hardware upgrades will still matter of course, but the transition process is getting slower, and developers are targeting a weaker average compared to old generational transitions.
PS5 vs PS6 handheld should be interesting. PS5 will have the CPU, bandwidth, and rasterization advantage, but I suspect PS6 handheld's larger RAM and advanced ML and RT features to push it ahead in many cases. As far as "holding back" goes, I'd be more concerned about Switch 2, Series S, and comparable PC's if I cared (which I don't anymore). For more demanding games that skip these lower-end systems, I think most of them will support PS5 and comparable hardware. PS6 is getting held back regardless of specs. It's just the state of the industry, and a profit-centric Sony can do nothing about it.
