This job posting hints that it'll take some similar trickery to get Project Scorpio to play the current generation of Xbox One games. This indicates that whatever else Project Scorpio offers, it has the potential to be radically different than the existing Xbox One, at least in terms of the hardware it sports under the hood.
Assuming Microsoft holds to its promise that all Xbox One games will be playable on Project Scorpio, you as the player won't notice much of a difference. But emulation adds a layer of technical complexity that makes it difficult to get old games running on new hardware — that's why not every Xbox 360 game can run, or run smoothly, on the Xbox One.
Microsoft is pitching Project Scorpio as a "monster" of a game console, bringing a lot more graphical power to the table that promises to far outstrip the Sony PlayStation 4, while simultaneously bringing the Xbox One games library into the future. It's just looking like it could be a difficult balancing act for Microsoft.
Microsoft did not respond to a request for comment at the time of publication.