Just made a quick search on limb lenghening, didn't know it existed long time ago. It was invented by a Russian physician in the 50s in 20th century. Thanks to this invention that people not satisfied with heights may have second growth chance.
And maybe in few decades growing taller surgery will become available to the whole world, so hopefully no one has to suffer from height neurosis in the far future.
There are also other things that I hope they become realities once science is able to. I hope we humans can finally live on other planets and do the stuffs we enjoyed doing on Earth. Living in Mars and Moon may not come anytime soon, but that dream will happen because population grows so fast, and we need new home to survive, to pass our cultures down.
What other big dreams are you waiting for? You hope the dreams come true when technology allows for.