Besides Boot Camp, if you install Parallels you'll be able to run Windows and Windows applications on an Intel Mac as well.

I've been with a PowerBook for about 2 years now and personally I like the way I don't have to configure this and that setting, especially when getting connected on the road. It's nice too how it starts up in a couple of seconds after awakening it from sleep. The less maintenance I have to do to keep virii and spyware out is as you note, another benefit.

Clients complimenting me on my cool notebook is also an added plus ^