Nintendo NX

Can Nintendo NX replace both the portable game system and the home console? 

That would require some kind of new display to do so effectively.

WII U
Nintendo 3DS

International Business Times

Nintendo president Satoru Iwata has commented on the company's next piece of games-dedicated hardware, codenamed 'NX', hinting that it may be replace both their Wii U home console and Nintendo 3DS handheld.

Iwata also spoke about why Nintendo is holding off on detailing the NX until 2016. "We can't talk about the NX," he said. "If we do, competitors may take our ideas and customers won't be surprised."

Nintendo's NX was announced as being in the works in March, in tandem with the company's declaration that it is to develop mobile games for the very first time. Shortly after the news broke we speculated as to what the NX might be, suggesting it could be both a handheld and home device.