I hate to say it as it looks awfully cool, but it's definitely FAKE...
Look carefully at the title of Internet Explorer:
The screenshot shows "Internet Explorer: Apple - MacBook Gallery".
However, using Internet Explorer 7, the title bar should be:
"Apple - MacBook Family - Windows Internet Explorer"
See this:
http://www.flickr.com/photo_zoom.gne?id=173314772&size=l
Not only is the text the wrong way round, but it is missing the word "Windows" too. And don't say it's hidden - if it is hidden behind the other window, it clearly isn't centred.
I guess the counter-argument is that Apple hide the word "Windows" =P But that seems too far fetched!