That's already the way things are going due to Microsoft decreeing that Copilot+ is the future of Windows, so AMD and Intel are both putting NPUs which meet the Copilot+ performance standard into every consumer part they make going forwards to secure OEM sales.
Actually, could they be used to make better AI in games? That'd be neat. A shooter character with some kind of organic tactics, or a Civilisation/Stellaris AI that doesn't suck.
Presumably you have a GPU? If so there is nothing an NPU can do that a discrete GPU can’t (and it would be much slower than a recent GPU).
The real benefits are power efficiency and cost since they are built into the SoC which are not necessarily that useful on a desktop PC.