What happens when Christians do follow the Ten Commandments?

The first three commandments are essentially different ways of saying to worship no other god, and almost all Chrstians follow this commandment. The exceptions are people in countries where Christianity is not well understood and belief is only superficial. There is no apparent difference in outcome, at least in this world, for people who do follow these commandments.

The next commandment says to do no work on the Sabbath, nor to require or request others to do so or even allow an animal to do so, and is almost never honoured. Most Christians would find it inconvenient and socially demanding to follow this commandment.

The fifth commandment is to honour your father and your mother, a useful social rule usually observed by Christians out of filial love rather than by bringing to mind a commandment. A son who strikes his father, even lightly, is no longer required to be condemned to death.

The last five commandments define some important moral ideals, although only stated in general terms: do not kill, do not commit adultery, do not steal, do not bear false witness against your neighbour, do not covet that which belongs to your neighbour, including his wife or slaves. The commandment against false witness is a commandment against lying, and some of the early Church Fathers demanded absolute obedience to this commandment, even while bending it themselves. A Christian who decided never to lie, even to save others from unnecessary suffering or to prevent a crime, would need to consider the consequences. The recognition in the tenth commandment of the rights of slave-owners is something not relevant in most societies today.