Soundwave on 08 January 2016
We know it's a game platform. We know that it will at the minimum be unveiled this year. We know development kits have been given to third parties.
We know from a comment from Mr. Iwata that this has likely been planned since 2014 and that it would take two years for it to come to realization (his time line) and it would redefine gaming some how.
Also probably linked to the NX, in late 2014 Nintendo signed a deal with Sharp for free-form LCD displays, a recent patent leak seems to confirm that deal is for gaming purposes (and not Quality of Life) as the patent showed free-form LCDs integrated into a game controller for gaming purposes. Also convienantly these free-form LCDs are not available until (you guessed it) ... 2016.
