That is the true question. 
And I don't feel that Windows users are just going to upgrade blindly. XP took a while to catch on, and I still know tons of people using old versions of Windows. Not to mention that many of the "features" of Vista are already in OS X, or freeware apps. I honestly don't think that Vista is going to catch on. There really isn't any compelling reasons to upgrade. Though I imagine they will do a media blitz as they've done with the Xbox 360 to convince people that their product is popular. Microsoft is desperate. I love it.
People who love eye-candy are going to use OS X, not Vista. And I believe Steve is releasing a product that's going to make it easy to make this decision at MWSF.
And I don't feel that Windows users are just going to upgrade blindly. XP took a while to catch on, and I still know tons of people using old versions of Windows. Not to mention that many of the "features" of Vista are already in OS X, or freeware apps. I honestly don't think that Vista is going to catch on. There really isn't any compelling reasons to upgrade. Though I imagine they will do a media blitz as they've done with the Xbox 360 to convince people that their product is popular. Microsoft is desperate. I love it.
People who love eye-candy are going to use OS X, not Vista. And I believe Steve is releasing a product that's going to make it easy to make this decision at MWSF.