Sony: PS3 and PS4 cross-play is 'technically possible' (update

You can change your PSN ID starting today, but PS3 and PS Vita games are not supported. Has anyone made the change yet? : r/vita

Fortnite Battle Royale cross play between PlayStation and Xbox players is “inevitable.”

Why don't the PS3 games play in a PS4? - Quora

Can PS5 owners play with PS4 gamers? Everything you need to know about crossplay

Do any other Playstation 5 owners mostly use their PS5 as a glorified PS4 pro as well? : r/playstation

PS4 System Update 11.00 Brings Small Improvements : r/PS4

PlayStation Vita Edition – Minecraft Wiki

Can Xbox and Playstation Play Together?

PS5 Guide: Ultimate PlayStation 5 Resource

PlayStation 5 - Wikipedia

PC/PS4/PS3 CrossPlay Now Available In DC Universe Online; Here's How It Works

Remote play: You can stream your PS5 to a PS4 in your house at 1080p (or to a phone/PC as before) : r/PS5

PS4 Remote Play survey asks if you want to stream to Switch or get a slimmer DualShock

Devs accuse Sony of “playing favorites” with PS4's cross-platform support