PlayStation 5 backwards compatibility for PS1, PS2, and PS3 games could be provided by a revamped PS Now service with upscaling capabilities - NotebookCheck.net News
PS5 backwards compatibility focus is all on PS4 games as Sony has no answer about PS1, PS2, and PS3 games - NotebookCheck.net News
Is The PS3 Backwards Compatible?
IGN - When asked if PS5 will have backwards compatibility with PS1, PS2, or PS3 like it does with PS4, CEO Jim Ryan said "unfortunately, we could not achieve compatibility with those
Sony Patent Suggests PS1, PS2, and PS3 Could Be Backwards Compatible Via the Cloud - IGN
Is PS3, PS2, and PS1 Backward Compatibility Finally Happening?