...I think it's just a Microsoft account, which you need to log into your PC if you're using Windows 10. They just call it an XBOX gamertag because money. :/From the video that Hambeau posted, it sounds like MC IDs aren't going to cross over and instead it'll be linked to your XBOX tag.
I do not, have never, and plan to never own a fucking XBOX. I don't have an XBOX gamertag and I don't fucking want one.
NO. STOP IT.
I'm totally with you on not wanting an XBOX, though. PC Master Race!
(which is actually justified in that consoles have only two things over PC: speed, and defined, pre-set experiences, which some people like, I guess. Both of those things can be achieved on PC, it just takes more effort. Other than that, though, PC gaming is just better)