If Tesla wasn't killed because and his researches wasn't stolen because I think this is the true behind the story, probably the electricity would be free now and teleportation available. And Elon Musk will have more knowledge and recurses for his experiments and products.
Tesla = Guru ! The greatest man ever lived.. I can wrote here for days but I will only say that if his inventions and projects were published or just given to the community now we would have flying cars and teleportation.