It should come as no surprise to hear that Nintendo is working on a new console. Fresh hardware takes years to develop, so engineers are always working on future systems while the rest of us play on the current generation of consoles. What we didn't expect, however, is for Nintendo to talk about its next system so soon. In today'spress conference, where the company detailed its plans to make mobile games with DeNA, it also teased a new system codenamed "NX." Few details were disclosed, other than it'll involve fresh hardware and gameplay concepts. The NX symbol appeared on a slide alongside the Nintendo Wii U, 3DS and other mobile platforms, which suggests it could launch as a complementary system, rather than an immediate successor to any of its current consoles.

http://www.engadget.com/2015/03/17/nintendo-nx-console/