I always have to take notice when I see popular media, like TV shows or commercials, doing the right thing and showing Mixed couples with no special fanfare about it. In other words, showing them as just ordinary. That is certainly the goal, that at some point there will be no more need to focus on such couples because they will be the norm, as they are in some places already.
Television and movies play a big role in our perceptions, so kudos to producers who cast with no concern for making the couples same ethnicity, The most recent I saw was a Lexus commercial featiring a seemingly White wife surprising her seemingly Black or Mixed husband with a car. Way to go Lexus.