The problem with Nintendo consoles is they always track at the start like they gonna set some record. But Nintendo gives up on them early and the sales tank.
Does a Nintendo console have the potential to beat a Sony one? Absolutely
Does Nintendo do everything in it's power to not make it happen? Absolutely
It is hard to argue for Nintendo selling better than a Sony console because of their actions in the past.
I think if the next gen Nintendo Console utilities the Switch concept, adds DLSS 4K and ray tracing support to it, offers smooth 1080p 60fps undocked and actual some damn features on their system lol (switch has less than even the WiiU i'd argue) and they market it well, and keep a steady flow of games and don't kill it too early, will be their best chance.