If Nintendo wants Nvidia to stay quiet, they will stay quiet.
I've been following Nintendo for 20+ years, I've followed every one of their systems announced from the N64 onwards (announced in 1993 as Project: Reality), and I will say NX is the most secretive *by far*.
We've gotten basically nothing/nada on it for almost 18 freaking months.
It's likely Nintendo has told Nvidia not to say anything, besides if it was known well in advance that a Nvidia Tegra chip was linked to Nintendo it would've been easy to speculate about the nature of the system since that is not a home processor.
AMD doesn't have great experience with mobile chips by the way. They have the Mullins chip which is even more obscure than the Tegra. Nvidia has considerably more experience and a more proven architecture for a device that's supposed to be carried around on the go and isn't a giant laptop. Nvidia was already commited to making a Tegra X2/Parker chip too, AMD basically has nothing in the pipeline that's comparable.
People need to let AMD go, besides of the contract wins that AMD was talking about, PS4 Neo, XBox Scorpio, and XBox One S basically do account for the three contracts they could have been talking about.
The whole "it makes more sense for Nintendo to ... XYZ" is tiresome, Nintendo doesn't give a fuck what makes sense, they march to the beat of their own drum. If we went by that logic the Wii wouldn't exist because nothing about it made sense to the average core gamer beforehand. Neither would the DS for that matter, because it wouldn't make "sense" to waste money on a second screen when the need to compete head with the PSP or Sony could take their portable market away, blah, blah, blah. Nintendo never operates in a straight forward way.
