NX and WiiU will use the same OS (run on ARM) for easy games port
NX is as well a console WiiU handhelp and use a separate case for connect it to the TV for have the second screen (by streaming). But this case is not just for display TV, this case is a small serveur whose contained CPU, HDD and a lot of RAM. It will be use for storing games or other Data ... it will give us massively multi-player games (up to 100 players simultaneously) and this serveur will be used for cloud computing ...
Nintendo will launch cloud computing community, which sell small servers connected together via internet will form an infrastructure capable of providing great computing power to all devices to connect to one of these servers ...
If you want more information on cloud computing, google is your friend ...
With this server, Nintendo will offer an online high quality while keeping the monthly subscription without ...
I think the serveur will sold alone for WiiU and futurs games use it, that is why we don't have any informations about wiiU games for 2016-2017 ...