Windows Phone 8 Windows RT [Supersite for Windows]

Excerpt from a Paul Thurrott snapshot of Windows Phone 8 and Windows RT

"Windows RT is a different animal entirely. Although Microsoft has been careful to keep the wraps on its ARM-based variant of Windows 8, I was able to spend a few days with a Qualcomm Liquid reference design tablet with dock, and I think it’s fair to say I know what’s going on here now. It’s simple: Windows RT is nothing less than a complete rethinking of what Windows can and will be in the future. It’s the future, in the same way that Windows NT was the future in the mid-1990s.
Put another way, Windows RT is the devices-based version of Windows 8. (Or, Windows 8 is the PC-based version of Windows RT.) There are differences, few of which are subtle. Windows RT lacks some Windows 8 desktop features—Windows Media Player and Storage Spaces—and can’t run any non-bundled Windows desktop applications, such as Adobe Photoshop and Visual Studio. But in return, you get a clean new version of Windows that lacks legacy deadwood and the attendant security and reliability issues, has killer battery life, and ships on devices that are silent, thin, and light."

Windows Phone 8 Windows RT