You may not be able to move the top bar, but that is not an issue since that is the menu bar, doesn't matter where on the screen it is located it is going to take up space, might as well be in a central location.

That being said, the Dock in OS X can also be positioned on either the left or the right side of the screen as well as at the bottom where it has always been. Not being able to move the menu bar is not an issue.