Theoretically, you could have a whole bunch of games that are only really going to work well on stadia (or via sheer brute force on high end gaming PCs) because theoretically you can configure your server however you want; make a game thats all heavily CPU bound physics calculations or whatever, just spec up a CPU-heavy server for players of that particular game.
Gaming machines are jack of all trade builds because thats your optimal distribution (and on the console side of things, they don't even jack of all trades it, they go for the cheapest graphics whore showcase they can that hits an arbitrary price point).
If you really wanted to make a game thats highly skewed towards one particular aspect of a computers functionality you absolutely could, its just a question of whether that would generate as much interest as a shiny graphics 'using game assets' maya render sizzle trailer.