Well it's not 100% dead anyway. Lenses and firmware are still available and no official word from samsung which leaves the slight possibility that there may be a future for the NX lineup. \
As I see it the biggest downside of a mirrorless system is the lens lineup. Samsung got a bad rep for the limited lens lineup but sony's doesn't seem to be much bigger, possibly because they are focused on putting out a new e mount ff camera every other week. Sony does have the benefit of having a bunch of lens adapting options as part of their ecosystem, but my concern is that on such a small body things are gonna be very front heavy. After using an slr for 3 years It's gonna be strange to leave behind the wealth of physical controls. I love being able to easily switch from continuous to single at a moments notice on my nikon.
So, yeah, the NX1 is rapidly becoming a dodo bird, but im gonna try and score one soon.