Or is it a fake?
I love the replies which are showing you ways you could actually do this... That's why this community is so cool!
That said, the image is clearly fake to some extent. The keyboard shows that the image has been flipped horizontally, so the images on the monitors have to be faked. That said, it's great that MorphOS looks cool enough to be their go to OS for the faking of a good looking desktop environment!