In the infobox of persons the current age of the person is shown by using the tag {{birth date and age|1946|12|18}}. It would be convenient, if this information is also shown in the article text itself.

e.g.
Steven Allan Spielberg (/ˈspiːlbɜːrɡ/; born December 18, 1946 - age 76) is an American filmmaker.

I think this would make the biographies of persons easier to read. Also a lot of newpapers automatically add the age of a person so people are used to have this information at the introduction of a person in an articles text.