"We're provisioning for developers for every physical Xbox One we build, we're provisioning the CPU and storage equivalent of three Xbox Ones on the cloud," he said. "We're doing that flat out so that any game developer can assume that there's roughly three times the resources immediately available to their game, so they can build bigger, persistent levels that are more inclusive for players. They can do that out of the gate."
they are promising 3x CPU and storage and, memory presumably, available on the servers for every Xbox sold. Assuming they do not need to account for anything near 100% utilization of time, that should be totally doable