Just revealed Bobby Kotick and Nintendo have had active talks about the next-generation Nintendo console, is close to Gen 8 in power (PlayStation 4 / Xbox One)

I have no doubt that the next Nintendo console will also be a hand-held hybrid like the Switch, it has just been too successful to pivot away from the form factor. So naturally that form factor has physical restraints that will affect possible performance. So I wouldn't expect any Switch 2, or whatever, to exceed the performance of devices like the Steam Deck or ROG Ally.