To really believe that is hard. I could tell you that anything is possible with the help of God, but I fear as soon as I bring God into the picture many people will start to doubt that anything is possible.
An electric car that goes 1000 miles on a 10 hour level 2 charge? It's possible, but at this point you're not getting air conditioning, and maybe not even windows that go down.
Can someone run a sub 2 hour marathon? I don't see why not. It's going to happen sooner or later, and unlike the amateur days of the first four minute mile, who ever does it first will probably get $10+ million dollars in prizes and sponsorships over the few years after the record.
Frankly, when Google talks about moonshot projects, I'm a little dissapointed. We went to the moon already in 1969. What about marsshot projects or jupitershot projects?
(This is partly a lead into my upcoming article about running 154 miles at the 2014 North Coast 24. Not many people would consider that a standard debut ultramarathon race performance, but it is certainly possible.)