1. Teleportation. It will allow people to cover huge distances in matter of minutes. Imagine what that will do for all those people who are separated from their loved ones because they work in different places. I could work here but live in Philadelphia, for example. That would be pretty fantastic. Of course, teleportation will never be free or uncontrollable. I'm sure there will be terminals where you'll have to pass through document checks and customs and pay a fee, but the mere possibility of this kind of travel will be amazing.
2. Human cloning. This will be an invention which will finally bring about a decisive victory for feminism and gay rights. Women will no longer have to go through the trauma and danger of pregnancy and childbirth. Men will be able to have their own children without being at the mercy of whether a woman wants to carry their child to term. Gay couples will be able to have kids easily. No wonder that conservatives are so terrified of cloning.
Which scientific advances are you looking forward to the most and why?