bitsandbytes
Newcomer
PS3 emulation seems unlikely. PS1, 2 and 4 are definitely on the cards - 1 and 2 are already emulated on PS4, just locked away, and PS4 on PS5 seems inevitable given assumed hardware similarities and patents regards BC. However, Sony are non-committal I guess because they want to be open to any hardware. What if an option becomes available for a paradigm shift in hardware that breaks compatibility but moves gaming forwards a significant jump? If you promise BC, you have to give up on that option which Sony won't do.
If PS5 doesn't have PS4 BC, expect realtime raytracing everywhere!
Even if you are right here wouldn't all this be a done deal by now (hardware locked down) even if PS5 is 2020?
The Sony BC thing puzzles me in all honestly from Mark Cerny telling DF that BC even with PS4/Pro was hard and how compatibility between AMD CPU/GPU gens isn't guaranteed to Jim Ryan basically mocking those that request full PS BC.
If all the negative talk Sony have said over the last couple of years is a delaying tactic while they work on it so they can announce it at the reveal it will be a really odd way of going about it.