I hear this a lot. It's like a mantra when topics concerning dated hardware comes up. I find this so incredibly confusing because I find computers fun. It's why I chose a career in computers and why, often times, work seems like play for me.
Wait until you start at a company that uses SAP, any you will dread using a computer
Now seriously: That looks like an interesting change in attitude. It used to be that "Macs are toys, for people who are two stupid to use a real computer, real work is done on PCs". (But then there were the people who said "I am a rocket science. I want to spend my time doing rocket science, not to figure out how to get a computer do what I want it to do, and that's why I use a Mac).
Today I think the situation looks like this (mostly): Places that use employees as paid slaves who are supposed to do their work, not to enjoy doing themselves while doing it, those places use PCs. In places where you need creative employees in a flexible environment, there is more a tendency to use Macs.
Macs are reasonably good for playing (there are a few nice games), but a Wii beats everything in that department anyway. And then there are "gamers"; I mean _serious_ gamers (which is a contradiction in itself, but they are not aware of that). They are not well served by a Macintosh, but a PS3 or XBox is probably better than any PC for gaming.