The thing I don't like about Kurzweil's singularity prediction is it kind of sounds like predictions in the 1960's that we'd all be living in space by now. Yet, here we are 50 years later still burning gas in our cars but we have phenominal GPS technology in our phones. People (even scientists) tend to overestimate the "deepness" of technological advancement and underestimate the "wideness". I predict that by the time a singularity occurs that it'll be much farther out in time and may not even be a distinguishable event.