While the concept of this technology is certainly fascinating to me, I highly doubt it holds any of the answers humanity hopes to find in it. (I also doubt it will improve the general "happiness" of people)
Humanity has always searched for answers in technology and while they have received many "answers", none of them carry any true significance. I relate it to expression of the entire universe as a mathematical equation. The equation may capture the "formula" of the universe but to an inhabitant of that universe, this equation has no real meaning; it is just an equation. I certainly do not advocate the abandonment of humanities' quest for knowledge or the renunciation of modern technology, but I find it ill advised to believe that technology will always hold the answer.
Even if humanity were able to significantly increase their intelligence over "modern" humans, would that guarantee another Shakespeare, Mozart, or Martian Luther King? Would it really make you happier? Modern humans are the most intelligent currently known entities in existence and just look at what a "wreak" humanity is as a whole.
If this progression to post-humanism is to ever occur, I must say that it is perfectly natural. Humans are just organisms, and technology is their tool. Those who say that this transformation is unnatural must not consider humans to be on the same level as nature.