The saddest thing about the reaction on HN is that so many commenters are angry this thing that we don't even have yet and didn't even dream of a few hours earlier will be 'only for the rich'.

I agree. These commenters seem to be ignorant of both the history of technological progress and modern socioeconomic reality. In case after case - cars, flight, computers, cell phones, electricity, indoor plumbing - a technology started out very expensive and rapidly became inexpensive and widely available as it became popular (in some sense, the most important factor determining the price of a technology is not its innate sophistication, but its popularity - the more popular it becomes, the less expensive; and anti-aging technology will be very popular). Furthermore, there are very few health-improvement technologies that are both 1) highly effective and 2) available only to the wealthy - expensive medical treatments are usually experimental. Also, one of the big problems with our current system is that it spends millions of dollars on the homeless.