Just wait a couple of years for their $700 Exclusivity Box 6 to come out with marginal graphics improvements, and oh by the way your old games are useless, but feel free to buy them again with sloppily upscaled textures.
If they time it right they can even release Overpriced Game Pt. 3 as an exclusive on the new box so you can never play them all on one system.
PS3 is the only Sony console not to have significant backwards compatibility support on newer lines of their product. PS2 played all PS1 games, 3 played all PS2 and PS1 games at first, then all PS1 games after redesign. PS5 plays all PS4 games. There’s no reason to believe PS6 or whatever won’t play PS5 and likely PS4 games also.
On the bright side, I don't think we'll have to buy them again. We can play them with a Exclusivity Plus Ultra Platinum Day 0 Premium++ with Squenix 385/2 Materia Edition Subscription™️ for only $50 a month!