Lets see you select text in a window, and create a new text file with that text in it, without using the keyboard and not making more than one mouse click… (not that it should convince you that mac’s are better, but its the non-obvious IU enhancements that you learn over time with a mac that really make the difference).
I think dashboard is just awesome, I have about 10 widgets in mine that have improved my efficiency with certain stuff 10x.
Expose is cool, I know there are similar apps on a PC, but I have NEVER seen one work as smooth and reliably as the apple expose.
Spotlight is awesome, nuff said.