Apple just released a new application called 'Boot Camp' that will allow Windows to be installed on Intel based Macs. Lots of people speculated on something like this, but I can't believe it happened so soon.
Looks like right now, you will be able to boot just one or the other at a time. But in the next revision of Mac's operating system, 10.5, this might be built-in and allow you to startup Windows, or maybe even just specific Windows applications when you want, which would be very cool.
Right now this will give people really no reason NOT to get a Mac, as any critical Windows application would be runnable on the Mac. Perfect. Just boot up the Windows partition, and stop complaining.
I liked Apple's little dig at Windows security:
"Word to the Wise:
Windows running on a Mac is like Windows running on a PC. That means it’ll be subject to the same attacks that plague the Windows world. So be sure to keep it updated with the latest Microsoft Windows security fixes."
I'd be interested in seeing the speed at which Windows will run in this environment. Hopefully virtualization will be a part of the next Mac OS, and I will never technically have to boot into a Windows machine again.