Nintendo yes. But they've long been a closed, relatively niche ecosystem. Their entire market cap is less than the value of this deal.
Sony, perhaps. But I do think the cloud platform is a critical piece, because it is a huge source of value capture (e.g., all CoD compute on Azure is no small deal). It also allows significantly more dominance in distribution via cloud gaming - and coincidentally, Microsoft has been much more aggressive about owning distribution with Xbox Game Pass. This is all on top of the fact that Microsoft influences the PC and console markets, not just the console market.
Sony, perhaps. But I do think the cloud platform is a critical piece, because it is a huge source of value capture (e.g., all CoD compute on Azure is no small deal). It also allows significantly more dominance in distribution via cloud gaming - and coincidentally, Microsoft has been much more aggressive about owning distribution with Xbox Game Pass. This is all on top of the fact that Microsoft influences the PC and console markets, not just the console market.