The question here is who is responsible for compatibility. And since it's Microsoft's platform, that falls on Scirra making their product compatible - though they'd need info from MS on what needs to be done. I think Ashley mentioned something along those lines in this thread awhile back.
Below is the rest of the conversation from today.
Unfortunately Construct2 is not compatible with Xbox One, and to my knowledge there are no plans for compatibility in the near future. You might be able to wait it out until Windows 10 compatibility has been completed, but this also may be a while. So sorry I don’t have better news
Thank you for the information. Is it because of the engine itself or just the lack of a plugin to handle xbox live features? Let's say they add plugins with your API to the engine. Would it then be possible to publish using construct 2?
Hi,
Unfortunately it is the construct 2 engine itself, so there is no workaround. So sorry I don’t have better news!