Switch owner here: So far, really like the system. Hardware wise, this thing is a slam dunk...huge improvement over the Wii U (which I own and like as well).
I think the biggest determining factor as to whether it is a long term success will be if the system can garner some genuine third party support, beyond a few e-games and rehashes of older stuff (like Ultra Street Fighter II, which I do enjoy, by the way). Yes, there are a handful coming down the pipe (Skyrim, NBA 2K18, etc), but you'd think there would be more announcements coming sooner than later, given the big system sales numbers thus far.