Remember hard drive activity lights? Yeah, back in the day they all had them, so they could blink in self-importance when your disk was busy with data-doing things. Then they fell out of vogue, so people wrote little applets that blinked an icon on your screen to do the job. Then those went out of style. No more drive activity indicators.
Well now that everything is virtual I'd like them back. I've been building an unfortunate number of windows servers, and during the initial tango of reboots and patch applications, you can't really tell when the disk is thrashing versus when the system is ready for input. You kinda get used to waiting for a few seconds of idle-looking-ness and giving it a sort of "are you done yet" drag of a window to see how quickly it redraws.
I think a simple hard disk activity light would make me feel a little more in control of the situation.