One thing that does seem nice is that the system is evolving in the direction of not requiring the user to do a lot of compulsive organizing work. You can fill up the whole screen with Dashboard widgets without worrying much about them interfering with anything. Old-style desk accessories would be hard to get to if your strategy was to just leave them lying around open, and though you can now uncover the desktop with an Exposé button, that would make desktop accessory windows scatter too, since these days they're just apps like any other. So maybe there really needs to be a UI distinction between desk accessories and other things, just to make it easy to call them up at any time.

Spotlight's good for lazy, disorganized users too. Many people have argued that they don't need to use a global system search very often because they spend a lot of time arranging files into a comprehensible taxonomy according to their private mental filing system; the point is that you could have a computer bother with that instead. I do remember thinking at one point that I could really use something like iTunes' essentially instantaneous search and Smart Playlist technology for the whole system.