This article does a good job of talking about how poor the windows experience on a handheld is, and why SteamOS could dominate handheld devices if windows doesn't start to make serious changes to improve it's useability and performance.
To be clear, I don't want to see windows succeed here, I would absolutely love to see SteamOS take over the handheld space and be a real linux ambassador to show people that they do have other choices than windows for their computers.
Now that GPU companies and developers seem to be giving some focus to Linux, I don’t know what Microsoft can do.
Windows is bloated to shit and that’s how Microsoft seemingly wants it. Unless they start to offer a stripped down release then I don’t see how it could compete with a Linux based OS going forward. (For handheld consoles).