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This new "Release Preview" build is actually the "Release Candidate" (RC) build of Windows 8 which means there are very less chances that Microsoft will add any new feature or make major UI changes in final RTM build of Windows 8. You should expect only bug fixes and performance enhancements in RTM build. The only UI change which you might see in RTM build is the removal of Aero glass as mentioned by Microsoft in a recent official post at Windows 8 blog.

Windows 8 Release Preview is available in Arabic, English, Chinese (Simplified), Chinese (Traditional), French, German, Japanese, Korean, Portuguese (Brazil), Russian, Spanish, Swedish, and Turkish languages.

Both 32-bit (x86) and 64-bit (x64) versions are available for download.

If the setup asks for a product key at installation time, please use following product key provided by Microsoft:

TK8TP-9JN6P-7X7WW-RFFTV-B7QPF

Windows 8 Release Preview Setup will check to see if your PC can run Windows 8 and select the right download. Setup also features a compatibility report and upgrade assistance. Built-in tools for creating an ISO or bootable flash drive are available for some previous versions of Windows (excluding Windows XP and earlier).

One more thing, you can upgrade to Windows 8 Release Preview from Windows 8 Consumer Preview, Windows 8 Developer Preview, Windows 7, Windows Vista, or Windows XP, but you might not be able to keep all of your files, programs, and settings. Check out FAQ topic for more details.

Interested people can download Windows 8 Release Preview build using following links:

Download Windows 8 Release Preview (Release Candidate)
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Download Windows 8 Release Preview (Release Candidate) ISO Images
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Direct Download Links for Windows 8 Release Preview (RC Build)
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Windows 8 Release Preview (RC Build) System Requirements
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