We actually already support ways that manufacturers can add custom pages to device property dialogs (many display vendors do this with the display cpl); many choose to do something else. It all comes down to what device manufacturers believe the user experience should be like. The Windows ecosystem is wide and varied, so you're getting a lot of choices. And with choice, comes good and bad options.
As I mentioned to freney, we will offer ways that users can enumerate the drivers they have in the Driver Store. We didn't have time to implement a GUI interface to this (that would have been great), but we will be able to satisfy the needs of the IT crowd with command-line and API interfaces.
From Device Manager (yeah, I know, blech) you can roll back to a previously installed driver from any device. And the Update Driver Software Wizard will let you manually select from a list of compatible drivers. I hope that most people won't have to do this, since our inbox support is improved over XP and we're pushing hard to get partners to support their newer devices seamlessly via Windows Update.