In 2006, Zune began to use a design style similar to Metro. Microsoft designers plan to redesign the existing user interface with fresher fonts and less emphasis on user convenience. Zune's computer-side support program also adopts a refreshing typesetting and design that is different from the previous portable media center user interface.
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"Windows8" introduces a new Metro-style interface specially designed for touch, which can display important information to users. This interface supports both mouse and keyboard, and is suitable for tablet devices. The subway-style interface design is elegant, which enables users to get a beautiful, fast and smooth subway-style interface and a large number of new applications available.
The new features of these applications go far beyond the scope of graphic design. As Microsoft has shown, you can use the mouse, touchpad and keyboard through an excellent touch experience. If users want to immerse themselves in the Metro interface forever, they will never see the desktop, and the system will not even load, unless they choose it deliberately, so that Windows will be brand-new.
The upcoming Windows application market of Windows8 (similar to the App Store in iOS) also uses and recommends Metro-style interface applications.
Baidu encyclopedia -Metro UI