Windows apps on OS X (X86)
According to several sources (one
visible here in French), it's easy
today already to install Darwine (WINE for OS X) on an intel machine running Mac OS X (X86). And if you, say, doubleclick notepad.exe, it simply starts and runs. In Mac OS X. Might not work for complex applications, initially, but as we've reported several times since Apple's intel announcement in June 2005, CrossOver Office is being made compatible with intel Macs, so if you want to, you'll be able to run the Windows version of Office 'natively' on Mac OS X without having to reboot into Windows.
The question, of course, is whether this option has more pros than cons at the end of the day. It gives the user some instant flexibility (run those Windows-only accounting applications, for example...), but it also takes away a reason to actually port the software to OS X! On the other hand, Apple moving to intel processors might take away a stone from the road for developers to port applications to OS X.
Either way: If Microsoft isn't fast and good with bringing Virtual PC to intel Macs, there probably already
will be a cheaper and better solution available! So let's treat this as good news. ;)