Nintendo’s chief executive, Satoru Iwata, quashed rumours that they were solely focusing on the smart phone market when he announced the NX.
“As proof that Nintendo maintains strong enthusiasm for the dedicated games system business, let me confirm that Nintendo is currently developing a dedicated game platform with a brand new concept under the development code name NX.”
We got a bit more in April 2016 when the said that the NX “will be unveiled later this year” and released in March 2017.

via Is this the biggest clue yet about the Nintendo NX? – BBC Newsbeat