The MBP is laptop. It is not a docked desktop. Now that we established that, the obvious thing is: There will be a mess of cables/dongles at your dock. Otherwise it wouldnt be a laptop, would it? You cant actually carry a desktop with you. So looking to the left, you have USB ports now. Its essentially a cable sticking into the side of your Mac. The new ones have the new ports. They are shaped differently. But at the end of the day, its essentially a cable sticking into the side of your Mac. Just like now. Nothing has changed.