You're wrong. Sony just proved that you can steal users from another platform. You speak as if thee platfrom is already out and only Nintendo enthusiast bought it, thats not how things work. The Wii U only has nintendo faithfulls because thats the kind of platform Nintendo created, they made a weak console with an odd concept, with ads made for kids and families, they had a shitty e3 leading up to the console's release, they only had their family friendly 1st party games at launch/launch window, they had so much bad press about its power even before its launch, and the 3rd party titles that were on it at launch didnt have that leap in graphics that people get hyped for at the launch of a new platform. I mean with out a bump in graphics you lose 70% of the hype that comes with a new console. Gamers casual and hardcore like to be wooed by new shiny graphics.
When you can get the community and press hyped about your platform, nothing else matters. If Nintendo offers a better experience than Sony and Microsoft are capable of on their platform, while showing off mega tone titles gamers care about at their e3 like Zelda in 1080p 60fps, F-Zero, Metroid, Pokken Tournament, Smash Bros, Mario Kart, a true open world Mario and more core cross overs with third parties and then score some major 3rd party titles and bragging about how their console has these games with better graphics than what ps4/xbox one can give, gamers will be lining up.