It is much more acceptable to not have a child these days. Many people are foregoing marriage altogether due to a lack of money or interest. Having a child does not make or break your life. It is becoming more and more common for people to wait for children or to not have any at all.
While I am sure there are many would be grand parents that would love to have grand children, I believe it is far more common for people to be childless in our era. While it is probably not the most common choice, there are many people in business or countries that have experienced over population in the past, that are choosing not to raise families. I do not believe it is taboo, like it has been in the past.