If any of the items you believed that would exist in the future were available today, then which item would that be? For me, it would have to be a machine capable of travel by teleportation. Scientists are already capable of teleporting particles and I do believe that some time in the future, it would be possible to teleport living organisms. For obvious reasons, it will be a quick and a hassle free way to travel from A to B and would make daily life a lot easier. Although, if there are any risks such are those featured in The Fly, then I may reconsider my opinion!