This is not a new concept. It is has been in existence since ages. It is only because urban couples are choosing to live apart, in different cities that the issue is being highlighted. The number of urban couples who choose to live in different cities is few. It hasn't become an 'epidemic' or a reason for concern. Moreover, couples who are in a distant marriage, schedule 'meeting' time. They plan their leave such that they can be together. They are ambitious, which is why they give their career more importance, but in that neither of the two is being selfish. Marriage is a partnership – and any decision jointly taken cannot be questioned. If the setup works well for a couple, society is no one to question it.
Everyone seems to forget that men have always moved to greener pastures, in search of livelihood – better jobs, higher pays, better living conditions. Men are known to leave their families behind and move to cities and big towns. It happens in every state.
Look at migrant workers – they live without their families, for most part of their lives. Look at the soldiers who get posted to far-flung regions – they live alone for most of the time too, going home only during annual leave.
As a society, we show double standards, by questioning couples where the woman chooses to live in a different city owing to her ambition/job, but don't raise an eyebrow when the woman is 'made to rot' back in the village!
A fool will always try to make sense of his nonsense!