Microsoft is preparing its first official look at the future of Windows next week, during an invite-only event in San Francisco. While a number of leaks have unearthed features and changes in an upcoming release of Windows, currently codenamed Threshold, the naming of the release is still largely a mystery. Referred to by many as Windows 9, the next major release of Microsoft's operating system could simply be called "Windows." There's plenty of evidence to suggest that, and a new report from Reutersclaims Microsoft will unveil a new name for its Windows product on Tuesday, which could be Windows 9, Windows, or an entirely different brand.