Well, at least Samsung isn't going into the whole mirrorless derby with mediocre effort, I'll give them that. For existing NX system users (though admittedly, I haven't seen one in my area thus far), the promise of such rapid lens development is a positive for them.
I wouldn't worry so much about their old sensor, they'll eventually make better ones - I think the worrisome point in the NX system is the lack of third-party support I've seen thus far.
The local prices here are pretty tempting, though. There's an NX100 bundle here that's selling for just over $500, and it includes the body, 20-50mm lens, 20mm pancake, and a small external flash. If I weren't saving up for some WR lenses, I'd be willing to try this one.