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

Xbox One vs. PS4 vs. Switch: Comparing the current gaming consoles

PlayStation 5 Will Play Almost All Of The Top 100 PlayStation 4 Games At Launch [Update] - Game Informer

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

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

Sony's PS4 Fortnite cross-play u-turn is the end of the console wars

Which Is Better: Xbox One or PlayStation 4?

The creators of RPCS3 are working on a Playstation 4 emulator : r/pcgaming

PlayStation 4 System Software Update 7.00 will bring Remote Play to all Android devices this week

CEO: PS4 blocks cross-console play to provide “best user experience”

PS5, PS4 & PC Victrix Pro BFG Controller for E-Sports

PlayStation 4: New FAQ from Sony reveals console can't stream home media or play music - Mirror Online