I'm glad somebody is excited. Not to be a downer, but I'm personnaly seeing copy-cat evolution, not revolution. The new toys just aren't going to change the way I work and play.
It's in Google's interests, as the king of Internet companies, to be at the forefront of whatever "the future of the Internet" is. I think to imply they crafted Wave specifically with advertising potential in mind is unnecessarily cynical.
Which is where they make there money and why they are doing all these products.
It makes perfect sense.