Replicator (Star Trek: Nemesis, 2002)
3D printing is on the right track, but the replicator – first seen in Star Trek: The Next Generation – is the ultimate goal. It can produce literally anything from pure energy, making it the cornerstone of Gene Roddenberry's post-scarcity society. When we finally crack this invention it’ll be the end of shopping as we know it. No more trudging round supermarkets? We can’t wait.