I've tried streaming to two windows 10 devices (a HP laptop and a Surface Pro 3) , I've tried hard rebooting the Xbox one twice, and rebooting the Windows 10 devices numerous times. Also tried the Windows 10 devices on wireless and wired. (The Xbox One is always wired)
when I click to start streaming, it says it's connected to the Xbox One, the Xbox One reports a "username has started streaming" then the Xbox app just goes "blanked out" as if the stream should have popped over the app's window
The "test streaming" feature always reports a success, however when streaming or trying the test, I never see much notable network activity in task manager of the Windows 10 machines.