You know, I think google wave was so close to this augmenting human intellec thing, perhaps the product was killed because it threatened to cannibalize other segments of up and coming products from google, I have no idea.
But I clearly remember the feeling I had when discovering it.
In the mid 1980 there was a similar craze related to dot-matrix printers and their cps (chars per second, or how fast they were). Then laser printers became cheap and everyone forgot about the dot-matrix. I guess this is the same thing. Fast forward 15 years.