Yesterday I upgraded my Windows Vista Business to Windows 7 Ultimate. And I have to say, it made a real difference.
First of all, the waking time has shortened by lots. When I wake my VAIO Z530N laptop from standby, everything is just there; no waking up message, no delay, nothing. And resuming Windows from hibernation is also a lot faster. With Vista, it took about 2 or 3 minutes to actually get the system running. With 7 it is less than a minute.
And top all of that with cool new features lake "shake", "snap", "pin to taskbar", "live taskbar", etc. Paint and WordPad have also been equipped with the new 2010 Ribbon.
All in all, I don’t regret having updated it. The only thing I have a problem with right now, is my built-in MotionEYE webcam, which is not recognized by Windows.