As I started reading through this thread, I was wondering the same as David Lohrentz. He may have been rather blunt in his asking, but I think it is very relevant to the discussion and did not see any intention of trolling on his part.
The Band performs very specific tasks and has a small screen to interact with and display information. For those who are disappointed that the Band 2 was announced without Windows 10 IoT, some of us are just curious where that disappointment comes from. What benefits would the wearable gain by being a Windows 10 device? Why is running that OS better/more exciting than a device that runs a dedicated firmware and performs its designed purposes efficiently?