In the past, extended lifecycle support has been usually tied with Microsoft's business software offerings however it was somewhat of an educated assumption that with Vista's Ultimate edition you were entitled to the best of both worlds.
According to Microsoft's Support Lifecycle Web page, support for consumer products ends after five years. There is no Extended Support option. I had always assumed that Windows Vista Ultimate, which Microsoft pitches as having the most consumer and corporate features, would be supported for more than five years. Besides, Microsoft does offer Ultimate to businesses for volume-licensing purchase, with caveats such as single activation.