They already have a foothold in the UK, or did you not read the CMA's findings
“Microsoft has a strong position in cloud gaming services and the evidence available to the CMA showed that Microsoft would find it commercially beneficial to make Activision’s games exclusive to its own cloud gaming service,” the government body said, announcing the findings of its monthslong review.
It reckons Microsoft “accounts for an estimated 60-70% of global cloud gaming services” already, thanks to the advantages of owning Xbox, Windows, and the Azure platform, as well as the Game Pass game subscription service to which Xbox Cloud Gaming is tied. The CMA views cloud gaming as an important, fast-growing sector of the games market that allows gamers to “avoid buying expensive consoles” and presents them with more “flexibility and choice as to how they play.”
So your quote of the potential market is ridiculous, Microsoft is in a Prime position to not only hold a monopoly in the UK but completely take it over.
Monopolies like Microsoft not only hinder innovation but stifle competition.
Why are you rooting for a company that is actively trying to destroy the gaming market is beyond me.
Do you have no soul Sleepy?