I'm very interested to see what Microsoft will call the Scorpio and whether it will be integrated into the Xbox One series or marketed as an entirely new console. Personally I cannot see how they can brand it an Xbox One as the disparity between the original and this is just way too significant however; they wont want to alientate or engrage existing Xbox adopters including S owners so they may have no choice but to integrate the overly-powerful Scorpio into their range which consists of an original machine (Grade C defunct) that plays titles like Battlefield 4 in semi-HD. They'd certainly have to tread carefully about any concerns of splitting the One consumer base and whether Scorpio-targeted titles can even run on old gen units from the first phase.
The 360 generation had a range of consoles from the Premium, Core, Arcade, Elite, Slim and E but most of the differences were around peripherals rather than central hardware like how the Arcade didn't have a HDMI cable or HDD and how the advanced 360 consoles then had those built in along with wi-fi rather than a standalone adapter. The Xbox One situation is way more broad and complex and it'll be intesting to see how Microsoft play it.