The PS5 Will Be Backwards Compatible, Thanks to Microsoft - PS5
Recently there's an influx of “PS5 backwards compatible” articles on google reporting it will play ps1 through ps4 titles. If it's true, much respect to Sony. : r/PS3
PS5 BACKWARDS COMPATIBILITY WITH PS4 +3+2+1 PATENTED? GAMESTOP CAN'T TRADE ITSELF, & MORE - YouTube
PS5's PS4 backward compatibility works like a charm - Polygon