SB ads for massive products are all about reaching the people you otherwise wouldn't. Nintendo knows how far their Directs reach and who belongs to their congregation, but is there value running a 30-60 second ad on TV for the folks who wouldn't see your Youtube presentations? I argue yes (especially since the commercial is going to immediately be uploaded to social media and fans will pick it apart for months).
But for it to be the first touch point of a product (i.e. initial reveal), I'm not sure that helps more than it hurts. It will simply drive a firestorm of questions to their marketing and customer service departments, which in turn will make them want to kill themselves.
Counter-point: to anyone who remembers the awful reveal of the original Switch, anything but that is a good thing, no?