I think we have pretty much figured out what the NX is with all the info leaked. It's a home console that has a port for the handheld and when connected the home console gets a boost in power. Or it may be a handheld that sits on a stand, which connects it to the TV and provides the handheld with more power. Either way. pretty much the same thing.
The only thing we don't know is if Nintendo will supply them together or separate. If separate, there's a real chance one would do better than the other, kinda defeating the point, though it would allow them to more power in both devices. I have a feeling, though, that Nintendo is going to try to package them together, which is good and bad.
For the good, it allows them to offer the experience they want to and doesn't divide the base among those who have both and those who only have one. For the bad, it means they are going to have to keep the power to levels that probably match the XBO, maybe less, when the devices are combined, to keep prices down. That's going to lead to a lack of interest from core gamers, who will want a more powerful device than they have now. It will also lead to a similar situation the Wii U is in in terms of 3rd party support. In other words, it'll be supported for the first couple of years, since it'll be decently easy to port PS4/XBO games to it, but once PS5 and XBT hit shelves that support will start to dwindle.
