Windows RT contains many of the same features as Windows 8:
Windows RT also includes some different features:
Some features aren't included in Windows RT:
Although you can install apps directly from the Windows Store, you can't install apps on the desktop on Windows RT. Office Home and Student 2013 RT Preview Edition comes preinstalled, which provides you with touch-optimized desktop versions of the new Microsoft Word, Excel, PowerPoint, and OneNote.
You can only install printers, mice, keyboards, and other devices that are certified for Windows RT.
More information can be found at - http://surface.microsoftstore.com/store/msstore/Content/pbpage.Surface?ESICaching=off