I had a brief and ongoing chat on Twitter with a MS rep who cleared up a question I had regarding the extent of Windows 10 Universal App support on XBox One. I wouldn't call it official, but it seems promising in terms of getting C2 games on the XBox One, and I haven't been able to find any other solid info on HTML5/JS apps and WebGL support on XBone elsewhere.
Here's a link to the thread:
https://twitter.com/DaveVoyles/status/5 ... 9065791488