This would be kinda cool, but also kinda the most terrible idea I can think of. MMORPGs rely so heavily on network effects to gain and keep players that any barrier to entry - and the requirement to have dedicated hardware is a pretty huge barrier - can be utterly fatal.

That said, I've really been enjoying Final Fantasy XIV on my Steam Deck - being able to pick it it up at lunch time and do a quick half hour of crafting or gathering really does present a different way to enjoy the game.