I believe that people who don’t see what Google Wave is for are simply looking at it from the wrong angle. Wave is not a social tool. It’s not Twitter, it’s not GTalk, it’s not Facebook. It was never designed to appeal to the crowds of geeks who are currently trying it out.
Wave is built for the corporate environment. It’s a tool for getting work done. And as far as those go, it’s an excellent tool, even at this very early stage.
I finally took Google Wave for a spin. Which means, I received an invitation, logged in, clicked around, and stared blankly. At the time of posting, this informal poll said that 56% of Wave users do just that - log in and stare blankly.
Make sure you click through to read the article I linked to above - I believe the author is onto something. And the way he frames the question is good - "What problems does Google Wave solve?".
It's not a twitter killer, email killer, etc. It's not a social networking tool. I think if anything, hits at the wiki market. Wave could create a lower barrier of entry for people to start collaborating like they would on a wiki. Without the administration of a wiki or trying to figure out how to keep the wiki organized.
For me, my clients probably aren't going to adopt Google Wave as their standard tool for collaboration. So I might occasionally be able to collaborate with individuals, on small projects - like something with my wife, or our church, etc.
As further gadgets and applications are developed (and as adoption increases), I'm sure the game will change - but for now, that's how I see it.