Though from what I've read, Microsoft could fix that relatively quickly, if they made some tweaks to Windows (and called it a special 'handheld gaming edition' or so).
For some reason, the Lenovo Legion S's Windows still comes with a lot of baggage and background services etc.
If LTT is to be believed, this is in the works Maybe SteamOS managed to ruffle enough feathers to start moving the inertial colossus that is Microsoft, not that I have much trust on their willingness to leave a good idea remain good in the long term