This eliminates an oft-heard Mac complaint that users, when working with multiple documents and applications, are forced to open an unmanageable number of windows. Multimedia junkies will also like a feature that allows you to quickly locate movie files and scan the clips for particular scenes. The Mac has always been a great platform for graphics. It's in evidence with just a cursory glance at the OS X desktop. Windows have shadows and pull-down menus are translucent so you can see what's underneath.
Buttons pulsate slightly and dialogue boxes crisply appear and disappear.
OS X has a new virtual memory manager, meaning you no longer have to fiddle with memory partitions to suit unwieldy applications. OS X should be harder to trip up at any rate. The problem with new operating systems is they aren't very useful until software developers make word processors, games and other stuff for them. The program lets you use your old apps, running them in a special mode called Classic. Performance is a little slower, so it won't satisfy everyone.