Microsoft announced today that it will call its next-generation operating system "Windows Vista."

The much-anticipated operating system had formerly been code-named "Longhorn."

Microsoft also unveiled the Windows Vista Web site and said the first beta test version of the system, which will be targeted at developers and IT professionals, will be available by Aug. 3. The system is scheduled to be released late next year.

http://money.cnn.com/2005/07/22/technology/microsoft_vista/index.htm?cnn=yes

Here is how the dictionary defines Vista:

1. a distant view through or along an avenue or opening : PROSPECT
2. an extensive mental view (as over a stretch of time or a series of events)