Serena's win was the 5th time that she has won a major title without dropping a set--in fact no player won more than 3 games in a single set with her all tournament long. Winning 18 majors means that she will go down in history as a legendary American tennis player, currently tied with the great Chris Evert and Martina Navratilova and could possibly catch up to Steffi Graf's 22 before she retires. At age 32 (just a few weeks before her 33rd birthday) Serena is the oldest major champion since Navratilova won her ninth(!) Wimbledon title at age 33 in 1990.
Currently ranked #1 and threatening to play until at least the Rio Olympics in 2016, Serena has a decent chance of reaching at least 20 titles.