Unless you know something no one else does outside of the MS Xbox team that's just pure guesswork.
I'd have thought it would be great news for all console gamers if the extra year means Scorpio is full 4K. MS may well have learnt thier lesson last time and if they want to win back console market share it makes sense that Scorpio will be noticeably more powerful than PS4 Pro, otherwise why bother. They certainly have the money and relationships with the hardware partners.
Enjoy PS4 Pro/XB1S now and in a year time hopefully we'll all have a choice which allows us to switch to "proper" 4K gaming if we want to. Who cares if it means you switch from one brand to another unless you have some emotional attachement to giving a Japanese or US company who neither know nor care about you money particularly?
With a bit of luck Sony will follow on a couple of years later with "PS5" at which point we'll presumably have other advantages and choice and can switch again if we want to.