Paul Thurrott is speculating that Windows 8 may have an alternative user interface for tablet devices that compete with the Ipad.
Windows 8 will include a new tile-based user interface that’s codenamed Mosh. Assuming this is true, I have to believe that this UI will be an alternative UI, and not a full replacement, or will appear only on low-end tablet-like devices aimed at the iPad. It sounds like something that will silence the critics who want the Windows Phone OS on a tablet.
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