A few years ago I purchased my Mac Pro solely to run 3 displays. I've seen evidence that the new Macbook Pro Retina can run 3 external displays so I am considering the upgrade. It would be the perfect setup for me if it works well. I have seen videos showing that it's possible (http://www.youtube.com/watch?v=qJhvyLB_Tbw) but I've never seen anyone talk about actually using it this way for an extended period of time. Has anyone done this reliably? This will be a work machine and 3 displays is essential so I'm trying to get some feedback before pulling the trigger. Thanks!