When I was a kid, the future contained two big promises. First, that we would have jet packs. Second, that the weapon of the future would be lasers (or possibly phasers). Since jet packs were featured on the intro to the Wonderful World of Disney, it seemed like the public would get jet packs first.
Sadly, the closest most people come to flying in a jet pack is using one in Grand Theft Auto IV: San Andreas. However, Slate is reporting that the United States Navy will have active lasers on ships within two years. One can take this as further proof that the Navy has improved since 1916. No word on when the jet packs will arrive. Although I guess these folks are working on it.