In tests with wild mosquitoes, entire populations of mosquitoes were bred to death within several generations. This result was achieved in 80% of tests.
Even if this break through is not perfect it would save millions of lives. It is estimated that over half a million people die from malaria every year.
An important question is what would the down stream impacts of a world without mosquitoes be? Fish eat a lot of larvae and only about 100 of 3500 species of mosquito bite humans.
This is an interesting Nature article about what would happen if we made mosquitoes extinct.