The same person who leaked the existence of Metroid Dread assures that a Spanish developer has received the development kit for the successor to Nintendo Switch.
I think Nintendo itself doesn’t need much more power than they’ve been using, but if they want to keep their 3rd party devs, the new system will have to be able to run Unreal engine 5 games in some sort of stripped down performance mode. Over half the new AA & AAA games currently in development all run on UE5