"The genetic conditions are currently targeted by pre-implantation genetic diagnosis (PGD), a technique that allows people with a specific inherited condition in their family to avoid passing it on to their children. Cells are removed from an eightcell embryo three days after fertilisation. The cells are put through PGD and embryos found to be carrying the defects are discarded while healthy ones are kept."
It seems likely to me that at some point it will be standard to check the genetic code of an embryo before deciding whether to continue with the pregnancy.
Yay! We're all going to be smart and good-looking! Yippee! What could possibly go wrong?