The rep told us that they interviewed ballerinas to see how they perform spins without feeling sick. Their trick is to focus on a certain object or spot on the floor, which inspired the devs to add the dot. For those who find it distracting and obnoxious, there is an option to turn it off.
Also removed was the head bobbing found in the earlier GDC menu. The rep said they are now viewing the game from your eyes and not your head. Finally, the developers of the game told us that the use of the sides of the screens provides a sense of peripheral vision in the game. We were told they hadn't decided whether or not to use letterbox widescreen for 4:3-resolution television screens.