The truth is that much of the plastic surgery we see today has a racial or ethnic component because it has to do with inherently racial concepts of physical perfection, like the 'Roman nose.'
My greatest fear about a world in which racial reassignment surgery becomes common is that it then becomes an expression of all kinds of class privilege. You have a truly dystopian society divided between the people who can afford to be racially altered and perfected and the ones who can't.