The same rules apply. If you upgrade
Windows 8 to
Windows 8.1 Preview you will have to reinstall all your desktop and
Windows Store applications once you upgrade the
Windows 8.1 Preview to
Windows 8.1 RTM. Every single one of those FAQ applies to both
Windows RT and
The important information is the following statement.
When you install subsequent editions of Windows 8.1 you'll be able to
keep your personal files, but you'll need to reinstall your apps.
If upgrade to Windows 8.1 by using the
Windows Store update or you use a Windows 8.1 RTM installation media you will keep all your personal files, settings, and installed applications. Any
Windows Store applications in either case will be downloaded again and be updated as required.