PS5 backwards compatibility will cover all PS2, PS3, and PS4 games according to Turkish retailer - NotebookCheck.net News
PS4 backwards compatibility: Can You Play PS1, PS2, and PS3 Games on PS4?
PS4 Backwards Compatibility: Can PlayStation 4 Play PS3, PS2, PS1 Games? | Technology
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