We aren't going to receive any official details about the Nintendo NX until next year, but leaks about the gaming device are still coming out. A report from the Wall Street Journal claims the NX is a hybrid between a console and a handheld. The form factor for the NX hasn't been mentioned, but Nintendo is said to be including a mobile unit with the NX that can be taken out for use as a handheld.
The WSJ says the console also comes with "industry-leading chips" that will let it compete with the current top consoles.
The exact shape of the NX hardware isn't yet clear. People familiar with the development plans said Nintendo would likely include both a console and at least one mobile unit that could either be used in conjunction with the console or taken on the road for separate use. They also said Nintendo would aim to put industry-leading chips in the NX devices, after criticism that the Wii U's capabilities didn't match those of competitors. - WSJ
Nintendo has also reportedly begun sending out developer units. If those kits are already available, an early 2016 launch and release for the Nintendo NX is likely.
When it confirmed the existence of the NX earlier this year, Nintendo described the device as a "new hardware system with a brand-new concept."