It would be another Wii U situation if it's another bad product like the Wii U. But then delaying the reveal won't help them anyway. Considering that several new hardware is releasing soon, this would have been the perfect opportunity to chime in ,,mid gen". Instead, they now give the entire marketshare to Sony/MS again, without even trying. Unless the NX reveal is only a few weeks later, NX is inherently hurt when everyone's already spending hardware money on VR preorders and others. While their already dead in the water public image is gonna go downhill even further, considering that now everyone believes something's seriously wrong with NX. Plus it's gonna like that they aren't even part of the industry anymore, when the rest of E3 is gonna highlight that Nintendo's not the place you can play any games at.
In fact, considering the console is supposedly 10 months away, it's highly dubious that they can't show anything off. I mean, iirc just recently Eiji Aonuma said that the infamous Twilight Princess reveal was based on a hardly playable build. Yet they can't get decent footage for games that they want to bring out in March? This stunt made me lose hope that they've learnt from Wii U significantly. This move is just as delusional as their Wii U strategy.