Like the PSP before it, the PlayStation Vita can access content on a PS3 and even play PS3 games remotely.
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Play your PS5 console over your home Wi-Fi with console-quality controls using the PlayStation Portal Remote Player. Experience the incredible immersion of the DualSense wireless controller with features like haptic feedback and adaptive triggers in supported games. Put your game collection on PS5 in the palm of your hand with the PlayStation Portal Remote Player, which can play compatible games you have installed on your console without needing to play on a TV.
PlayStation Portal Remote Player
PlayStation Vita - Wikipedia