That white clean look is going to start looking disgusting once it gets use in the real world. I see them imitating apple's design aesthetic, but they really should have learned from the white macbook - because this is going to be worse. Cash registers are already always dirty, because there's high transaction volume there - it's literally the bottleneck. Now it's white and pretty looking, so it'll draw your eye, which basically requires every business who gets the square stand to give it a good clean daily.