I completely agree with Ammalgam.
One can say as much as he likes about how one would never need the resources that AERO consumes, but my argument is this: Why bother wasting resources at all? There are over a million things that I'd rather do with my resources (such as getting producing more WU's for Folding@Home).
So far, the only programs that M$ has produced in this new wave of "modern" software that I actually find useful are Windows Defender Office 2007. That's because the ribbon actually saves me time. I've found that most of the changes in Vista waste my time and resources.
IE7 is - and probably will also be in the final version - utter crap compared to Firefox. I have to major bones to pick with IE7. The first being that the new layout buries the controls that I use frequently that I NEED to have at my fingertips 24/7. The other major problem I have with IE7 is that it still lacks extensions. Toolbars and extensions are two very different things. IE7 cannot block ads, does not have mouse gusture functionality, does not have a smiley sidebar, does not have the directory up button, does not have the weather in the status bar, does not show my adsense status, does not take advantage of my unused bandwidth to preload pages, does have manageable tab sessions, does not have a gmail notifier, and does not have all of the tools I now can't live without that are included in the Web Developer extension. That's a lot of functionality that IE7 is missing, and that's only the beginning!
I don't mean to turn this into a flame thread, so I'll finish this post on a happy note lol. I absolutely love Office 2007. I never would have believed that I would ever have a reason to switch from Open Office to M$ Office, but Office 2007 may be just that.