Windows expert Ed Bott points out that the Ultimate flavor of Windows 7 might not be worth the upgrade for home users.
Microsoft still hasn't officially released information on exactly which features will be included in each version of Windows 7, but based on some reverse engineering by Paul Thurrott, most of the features expected to show up will be geared only at corporate users—stuff like AppLocker, Federated Searches, and booting from VHD files.
As Ed Bott points out, the only features that would be useful to consumers as well are the language packs and BitLocker drive encryption. His conclusion:
But here's the bottom line. For most people, Windows 7 Ultimate will be an unnecessary luxury.
So the question you have to answer is: Are language packs and BitLocker important enough for you to upgrade? Tell us in the comments.
What's in Windows 7 Ultimate? [Ed Bott's Windows Expertise]