We were really close to transporters in the 1980s but they never could figure out the recombinant DNA problem. They'd also need to make it smaller unless you want every office building to have one transporter room filled with every employee's individual transporter. I guess every transporter could have its own code so there only needs to be one per office, you just dial in the number, and you get to go to there, but only one person could use it at a time because if it happened in two places simultaneously...jeepers. You could turn it off so that people can't get into there after closing time. What would be scary, though, is if you try to sync up so that you enter the place right before the transporter shuts off and because it's not operational, you're kind of stuck in limbo until it's turned on again, which would easy be like sleep or it could cause madness. I guess you could bounce back to your original place, but what if someone shut that one off simultaneously? Maybe you could make it so that the one you go into won't turn off unless it receives confirmation that you arrived at your destination safely.
I don't think there was ever any widespread belief that we would have teleporters or time travel by 2010. "Space Ships" is on the money. When we got men to the moon by the 1960s everyone truely believed we would have bases on the moon and manned travel to the planets by now. The technology is there but not the economic impetus.
The problem with predicting the future is that prognosticators don't know what new technologies will arise, so they just extrapolate from what currently exists. So in say 1900 "future travel" meant gigantic atom-powered zepplins.
That said, how bout
Effective solar power