I used the Sunshine game streaming software and the WiiU homebrew port of Moonlight to get game streaming working on a WiiU gamepad. It’s sort of like a bootleg Steam Deck, and it works surprisingly well, but it mostly just made me want a Steam Deck.
480 would be NTSC. PAL was higher resolution. But, yeah, the latency was basically imperceptible but the fan noise was real.
PAL is 525 lines.