Yeah why not? The metaphor works/I cant think of a better one. One thing that I like about some of Apple's approach to things is that the user explicitly enters a mode or changes frame of action. There is a mode the user enters when moving around ios icons/making folders, there is a mode when editing content that appeared to be static at one point. The faux leather/fake realism helps make that switch. If the Xbox os looks just like Metro, how does the user know when things are different?
Yes, well, I'm all for having a popup and for having it stand out in terms of design. I just say that the GameCenter-Popups is a very poor design, especially by apple standards.
In other words: The metaphor is fine but the execution is lacking.
