"If previous rumors about the Xbox essentially doubling up as a beefed-up gaming PC are accurate, Microsoft will need all the power it can get to run a somewhat full Windows install. Third-party launchers such as Steam and Battle.net will further drive up the need for extra compute."
Was this written by a human who should know what they are talking about>?
Having extra store fronts doesn't eat more compute - they are game delivery services, just like the locked down setup on console right now - the only thing requiring much compute is the software you run (or in Windows, SOMETIME a specific OS-related task that most people dont bother with). If you are going to have extra stores running all the time, I suppose, in terms of RAM that is an issue, but I doubt the box would be entirely limited to just the 24GH of ram that games needs if it endeavors to also run something-something windows (perhaps some ddr4 that is good enough over on the side - and you only get Windows on the pricier box - the cheaper box just gets to also use Steam Big Picture mode for many more games to play day one and MS gets a cut from Valve for delivering a ton of business from console user).
Anyway, more compute is not need just because you have store fronts installed, or even if they are running, since they mostly do nothing but sit in memory doing mostly nothing.