3 Reasons:

  1. It still won’t use the XP driver model so all those peripherals that don’t work with Vista still won’t work with it. This has been one of the biggest complaints with Vista.
  2. It will still be riddled with DRM and the precursor to “trusted” computing. This is what’s causing Vista to be so slow at copying files over the network.
  3. Fanboys are claiming that it will be perfect out of the box. No OS is ever perfect out of the box, not even Linux.