While some technologies (like personal computers) have flourished, others haven't lived up to the hype. If the tech hype from the early eighties were true, we'd all have flying cars and intelligent machines in our homes, and normal passenger airplanes would fly at 5,000 km/h.
Timescales might be wrong, but do you really think that flying personal transportation (or helicopters, as we currently call them) and intelligent machines are an unlikely prospect?
Flying cars and helicopters are not the same thing. The idea proposed in the early eighties was that "everyone" (meaning the majority of consumers in first world countries) would use flying cars instead of normal ones. This isn't even close to coming true (or being feasible), even if flying cars actually do exist (http://www.youtube.com/watch?v=EHXnLCIgNug).
You're right, it's not even close to coming true. Yet.
However, that doesn't mean it won't happen.
Have you read much about commuting in Sao Paulo or Rio?