There's already a ton of options ranging from extremely powerful + expensive ROG Ally ~$800 to the Steam Deck ~$400 and much smaller/weaker Android and Linux handhelds like Retroid's products from ~$100 - $300. The PC handhelds actually run Switch games better than the Switch does.

We're actually at a point where some Switch games will even run on smartphones.

I wonder if Switch games could be run in a WINE-like environment.

That would be fascinating!