Technology that could have existed

If a famous scientist had died before making his groundbreaking discovery, or if certain events took place which altered the course of history, what kind of technology do you think we would have been left with today?

I'll start off with two things that come to mind:

1) If Nicola Tesla or another scientist had come up with a method to transfer electricity with practically no energy "loss", we could perhaps dial a number on our cellphone and request it to be wirelessly charged from the closest "energy tower".
2) If Hindenburg had not exploded, zeppelins and airships may have retained their original popularity, and would have a wider usage in different applications. Armored war zeppelins, similar to flying submarines in appearance?