NEW PS4 PS3 PS2 PS1 *DISC* Based Backwards Compatibility Update - For PS5! (This is BIG) - YouTube
PS5 backwards compatibility guide: PS1, PS2, PS3, PS4, and more
Sony Teases PS1/PS2 Backwards Compatibility In PS4 Customer Survey - SlashGear
Amazon.com: Brook Wingman PS2 Starry Blue Converter - Special Wireless Version of PS4/3 to PS2/1, Retro Consoles Converter on PS2/ PS1/PS Classic Consoles, for PS Retro Consoles (Starry Blue) : Video Games
PS4 SERÁ RETROCOMPATIBLE CON LOS JUEGOS DE PS3 PS2 PS1 EN 2018 - YouTube
PS4 May Be Able To Play PS1 & PS2 Games Soon » Fanboy.com
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