You will be able to disable Metro entirely. Anything else would be suicide in the enterprise market.
That also brings up a very valid point, though. Why in hell should I pay the cash to upgrade to Windows 8 if I have zero interest in running anything Metro? With the Metro crap disabled, it's essentially Win 7 visually.
The answer to that is - I won't. I have no reason to upgrade to Windows 8 on my desktops, I find Metro atrocious for desktop use, and I wouldn't touch a Windows 8 tablet with a 10 foot pole. The tablet market is awash with options, and Win8, especially the WoA ones that will be showing up are the least attractive out of all of them.
For all that can be said against the ipad and the locked down nature, I find my ipad absolutely indispensable and it for the most part has replaced my work laptop. If the one specialized program I require on my Windows powered laptop was ever ported to iOS, I'd likely never use my laptop again.
