One of the most disappointing things to me (so far) about our modern age is that we do not have personal jetpacks for travelling around town. Pollution-free, of course. As a child growing up watching The Jetsons (and a grown-up who to this day learns most of his science from cartoons), I truly thought we would have jetpacks by now.
And time travel! We were promised time travel!
Which makes me think. . . about how I would love to go back in time and slap some people from my professional past.