It's a neat, but very niche, piece of technology. It's not dominant, in any sense of the word. It might be in the future, but it's not a sure thing. The fact that you can find hardware that supports it isn't interesting to me. It'll be interesting when I can be just as sure that a machine will have a TB3 port as I can currently be that it'll have a USB-A port.

One of the things I actually dislike about it: a port can be USB-C without being TB3. That's going to be fun with the plain USB-C port in my laptop.