The UK Competition and Markets Authority (CMA) went all Gandalf on Microsoft as it sought to push through with its $70 billion purchase of Activision Blizzard. But, the reason for the denial isn't what you think.

According to the CMA, it's blocking the proposed potentially industry-altering acquisition due to concerns regarding the competition and market dominance, specifically, in cloud gaming.

The CMA, the foremost regulatory body responsible for ensuring fair competition in the UK market, has spent several of the past few months deliberating the planned buyout by Microsoft.

According to a statement from the CMA, letting Microsoft own Activision Blizzard "would lead to a substantial lessening of competition in the video game market in the UK, with potential negative impacts on both consumers and other businesses operating in the market."