Microsoft has needed to respond to SteamOS ever since the Steam Deck launched three years ago, and it has steadily been tweaking its Xbox app and the Xbox Game Bar on Windows to make both more handheld-friendly. But there was always a bigger overhaul of Windows required, and we’re starting to see parts of that today.

The device sports the twin arms to better resemble a typical Xbox controller.

On the ROG Xbox Ally, the new full-screen interface completely replaces the traditional desktop-and-taskbar interface of Windows, saving what Microsoft says is a couple of gigabytes' worth of RAM whi...