I agree with a whole lot of what you are saying, but I do think there is one non-fashion-trend reason to at least tone down skeumorphism, and that is pixel real estate. Drawing icons so that they look like realistic 3D objects requires more pixels. When you're on a phone with limited screen space, that's not the best idea. However, I'm not an absolutist here. Skeumorphism does help to clarify the meaning of things sometimes. If all you see is a colored rectangle, there's less that intuitively conveys interactivity suggestions such as 'you should push this'.
Hopefully things will tend to converge around a balanced approach.