I think Apple's move to use Intel CPUs, and the subsequent BootCamp option and virtualization apps (Parallels, Fusion) made the Mac a viable option to many people who previously eschewed Macs. But it may not be a perceived safety net, it might be necessary to run Windows apps despite the features of OS X. So would you use a Mac / OS X without the ability to run Windows apps? I'm a switcher brought over by the safety net of BootCamp and Parallels. I've since found that almost all of my Windows use ceased after the first month. But I use BootCamp for some gaming; life would be less fun without that. But I still require Parallels / Windows XP for personal finance, VPN access to work, and some use of IE for accessing my 401k website. So for now, I'm still chained to Windows; but having access makes a Mac viable.