Comment by bombcar
Exactly - or they could have released a rare, ignored souped up Xbox as the "Xbox 2" and done the "Xbox 3".
The 360 was a good "fix" for the problem but not going to something like Xbox13 or Xbox2013 (though year based names were on the out by then) - anything other than "Xbox One" (Xbone would have been better).
I still don't know how the various versions work and apply to the Series SeX.