But MS cannot subsidize such a machine if people can just ignore the MS/Xbox store and just buy games from Steam instead, which is what tons of people will do, since you can actually buy Steam keys from all sorts of sellers who offer competitive discounts and whatnot all the time, making it pretty much an objectively cheaper way to buy games. Plus Steam is just very likely gonna be way better than the Xbox interface.
And this ignores that Valve can offer this same sort of hardware offering at the same value themselves, but with that likely superior Steam interface instead, including a SteamOS front end for a very console-like experience for those who prefer that.
Basically, the avenue that Microsoft could go down here would be one where their lunch could easily be eaten by a major competitor. Same thing with handhelds, as that's an area where such competitors already exist and again, can likely do it better than they can in terms of the user experience.
I really think MS need to drop the pretense that they can keep up this 'console' hardware strategy at all.