We'll see. Hopefully it is not as half-hearted as the other technologies Microsoft tries to establish and then forgets about. They will need to put a lot of effort into it to have something even remotely equal to Node (or other micro servers). And when they deliver, the Node hype could be gone already! ;)
Then you are happy to read about Owin :-)
using (WebApplication.Start<Startup>(url)) { Console.WriteLine("Server running on {0}", url); Console.ReadLine(); }