The only people saying that "Metro is the future" and the "desktop is deprecated" are people who haven't engaged their brain
In that case, the guys from Microsoft are not engaging the brain then. The Build talks that spoke about LOB apps in Windows 8 place heavy emphasis on moving to the new UI. They spoke about 98% of LOB apps can be moved over. They repeatedly state that developers should "move their apps forward" to the new UI. They repeatedly state that the desktop is the "old" and that we should move to the "new".
I realize that we can still use the desktop, but my experience has been that it is more difficult to deploy .NET applications on Windows 8 than at anytime in the past. Just the fact that it took us 4 weeks to figure out how to automatically activate .NET 3.5 on a Windows 8 system that does not already have it activated is ridiculous. To me, this points to the fact that the desktop area is entering the legacy phase.