[davidalln]

40 years ago I'm sure email seemed like a "niche tool" used by only the technical savvy. I'm not saying that Wave will replace (or even that it should replace) email, but I do think that, especially as a younger, more technically savvy generation grows up (I'd gander that less than 10% of the students at my high school don't actively use Facebook), and as that younger generation enters the workforce, technologies like this will rise up and become a popular standard. Whether or not it will be Wave remains to be seen.