No but it does need enough performance to be capable of running games in low quality modes. The Switch is so anemic that many big budget games are simply not even trying anymore as performant running can’t be achieved without complete rewrites of engine code. So a better Switch that is at least a low spec gaming computer will enable more big games to many the effort of trying to support it.
Hopefully they’ll actually use an active dock with cooling this time rather than the simple stand that comes with the Switch 1.