Microsoft certainly isn't just filling server racks with Consumer model Xbox Ones, if that is what you have pictured. They have rack-mount servers that share the Xbox Architecture.

The Xbox One and PS4 are modified PC architectures with slightly specialized graphics hardware. All three are doing the exact same thing: building traditional server racks, just with with an added focus on GPU power/performance. Google doesn't have a leg up in their datacenters, and if anything has the detriment that both Microsoft and Sony can run Consumer-targeted software builds directly on their racks, whereas supposedly Stadia needs new game builds, customized to the new hardware.