Sometimes skeuomorphism is useful, when used right. For example, Microsoft's Fresh Paint app for Windows 8. Extreme skeuomorphism which actually combines well within the flat W8 interface, screenshot: http://upload.wikimedia.org/wikipedia/commons/f/fa/Freshpain...
You have got to be kidding. That looks terrible and wastes half the space on the screen. It's not even very good skeuomorphism, the drop shadows aren't in a consistent direction, and the layering of the brushes and canvas doesn't make sense.
Other than the paint mixing area, how is that any better than something like SketchBook Pro? I can't even tell which controls will bring up submenus or secondary controls.