[...] however iTunes’ new display of Apps is horrid; every app icon has an ugly faux-perspective bevel that just doesn’t seem to work. I don't understand what the author is referring to here. The screenshot looks just like I remember iOS app icons looking -- they've always had that canned bevel+gloss look applied to them. Overall, the new iTunes makes me think that Apple keeps inching towards the Metro look. Gradient…
I think the iOS icons always had a gloss, but they now have a strong bevel particularly noticeable on the bottom. I've noticed that icons with text or design elements overlapping the bevel look especially strange.
The idea with that bevel is probably to make the icons look somewhat more three-dimensional when they are "stood up" on a perspective plane (like the OS X dock does with icons in its default position at the bottom). The problem of course is that the icons were not designed for this kind of pseudo-3D look, and that's not something that can be fixed by simply compositing a sharp dark shadow at the bottom edge of the icon.