What (if any) backwards compatibility do you think the PS5 will have?

I don't mean streaming (I think they have a way to do that now) but I mean you can put a disk from a previous console in and it will play.

There are rumors that the PS5 will be fully backwards compatible to the original PlayStation what do you think?

I'm skeptical, I think we can expect PS4 compatibility at least on the launch model but I'd be surprised if it did more. Can you imagine how amazing it would be though? It would most likely be emulation so it wouldn't be perfect but I'd have 3 less consols in my entertainment center.