Yeah, I don't get the recent backlash with Kurzweil on HN. I understand being critical of some of his conclusions, but he's had a pretty impressive career before becoming an author, and quite frankly he has the best track record out there on predicting the future.
It's amazing how accurate his Age of Spiritual Machines predictions became, even if some of them were a year or two late. Google's self-driving car, ipads, Siri, Watson, Google Glass, etc. He seems to always get technological capability correct, but sometimes misses the mark on technological adoption.
Even if a few of his more outlandish predictions like immortality are a few decades - or even generations - off, I think the road map of technological progress he outlines seems pretty inevitable, yet still awe inspiring.