Yes, but if you connect a computer screen to a server, you'll notice that servers usually don't have GPUs for anything beyond "show a 1280x1024 console screen".

Yes, but if you connect a computer screen to a server, you'll notice that servers usually don't have GPUs for anything beyond "show a 1280x1024 console screen". Unlike a server, the Steam Deck is literally marketed as a device that can be used as a "desktop computer", that's the entire purpose of the optional USB-C dock.