I think it has to do more with avoiding ugly news headlines.
In the last year, the press could easily provoke a response by declaring how far behind Nintendo was to their sales goals. It made the WiiU look extra bad. By setting a very conservative estimate, they probably won't need deal with the same perception issues in the coming year.
Aim low and you're sure to hit.
I predict NX launches in 2017 - not 2016







