I bought an iMac in the spring of '04 on a whim (yes, a whim) and have never looked back. The integration of digital tools with iLife alone makes a convincing argument for many home users to switch. The OS has never crashed, does't fragment the disk(s), and is reliable day in and day out.
My Dell laptop would be on Ebay if it weren't for the fact that I have to run a few windows apps for work (tried VPC7, too slow!).
My first Mac was an SE/30 that I got in 1989(still have it in the closet). I was a dual user; Wintel at work and Mac at home. Those first Wintel machines were pure boat anchors but the fledgling IT group had declared Gatesware as the corporate standard and it was political suicide to recommend anything Mac at work, such as how productivity would increase if you didn't have to reboot 20 times a day.
I'm still a dual user. Gatesware has come a long way and it's nowhere near as painful to use, but I'll never use one at home. I've never owned a Wintel machine and never will.