Hi Essay,
From a purely economic viewpoint it does not seem that we are still on the same accelerative trajectory today as that of the recent past. The current worldwide economic downturn makes this quite evident. One may argue on such grounds that accelerative growth ended some time ago - perhaps in the 1960's??? My analysis though forces us to, at the very least, extend the period for which humantiy has been experiencing accelerative growth until the advent of the world wide web. If that is we agree to measure this acceleration purely in terms of communication. I think on that basis accelerative growth is still occurring and will extend to the 2040's. Although, I am willing to concede that perhaps in hindsight we may one day look back and see the highpoint at some earlier date than that. So why is it that Star Trek and other Science Fiction futures seem far off or unrealistic. Well in my blog i explain that inbetween major communication revolutions there is a shift in economic organization (more accurately there is an ecological revolution). The last shift happened during the industrial revolution. Essentially all the technologies we have today, including computing devices, trace their ancestry to the period between 1772 and 1914. The extrapolations that science fiction writers have made were based on this process being taken to higher levels e.g. solar system and beyond. Whereas what actually happens, from a historical viewpoint, is that humans shift economic mode when one system has exhausted its potential. I think we are very close to reaching that point. But when the next mode arrive - I speculate in my first blog post it may involve ubiquitous computing and fluid human-computer interfaces - the process of advancement begins anew.
p.s. I hope like you that we become more humanitarian as we progress towards the 2040's matching the explosive rate of information sharing that will occur. I believe this will be the case being an optimist.
Tanny