Human life in the year 2100 will better in at least three ways. First, medically speaking, mankind will enjoy a longer life span. Illnesses that are incurable today may be curable one hundred years from now. Consequently, human beings will enjoy a longer life.
Second, human life will be better politically. Today, there is still no freedom of speech or of religion in some parts of the world. A century from now, I believe the people in these places will enjoy this human right.
Third, man will be better off materially. Man will enjoy more comforts brought by machine. For example, robots will enter the household and take care of the chores.
In summary, it is hard to imagine exactly what life in 2100 will be like, but it is likely to improve in many ways.