A bit off-topic but still AA related;
A few years ago, I had an AA calendar on the wall of my cube at work, one of my colleagues stopped by, looked at the picture for a few moments, then said, "nice picture, too bad it's not in color".
As for the picture at the top of the thread, color would ruin it, in my opinion.
As for PS, depth of field is one "manipulation", if you want to call it that, that pretty much cannot be done in photoshop, it's got to happen in the camera. Though the short lenses that most digi's use lend themselves to lots of (apparent) depth of field.