BennyBlanco
aka IMurRIVAL69
Nintendos past practice has been to announce their next generation consoles at E3, and to release them 18 months later. And they typically will have a prototype and a couple of game markups where you can play something.
But they take about 18 months, and last I checked we dont have 18 months until the end of 2016. So, it is less likely that something is coming out in 2016. But, the rumours are that there are NX dev kits out there. We dont know how long they have been out there, but if the rumour has leaked they have probably been out a couple of months. It is really slightly possible that developers can make something for NX console launch in fall 2016, and do a quality product in 13 15 months. Slightly possible.
He believes that possibility is largely drawn from whether Nintendo NX will have parity with PlayStation 4 and Xbox One not only in relation to technical specification, but also in the relative ease of the development environment to port code.
Pachter continued, The more the NX looks like a PS4 or Xbox One, the more likely it is that its coming out in 2016. The less it looks like a PS4 or Xbox One, the less likely. If its a different language, it requires developers to tweak a lot of things from Madden, FIFA, Call of Duty or Grand Theft Auto in order to get it ready for NX, 13 months is probably not enough time and its probably a 2017 launch.
http://www.nintendo-insider.com/2015/12/07/pachter-nintendo-nx-unlikely-to-launch-in-2016/