It's true that superintelligence is likely to be a big deal. It's interesting to see where intelligence works worst, though. As civilization accelerates, its slowest aspects will be the ones holding things back.
I think the L.H.C. is our current best example. There's no "Moore's law" for particle accelerators. Another example involves understanding large complex systems - such as predicting the weather or stockmarket crashes. Of course intelligence helps with such things - just not as much as in some other areas.
I wrote a blog post responding to Kevin Kelly that I'm fairly happy about. It summarizes some of the reasons why I figure that superintelligence is likely to be a fairly big deal. If you read it, please post your comments here.