It has happened yet. You know what William Gibson says- the future is already here, it's just not evenly distributed yet.

There are several X that are the new "silicon valley". you just don't recognize them because your pattern recognition is tuned for the current silicon valley.

Several of those predictions, by the way, have come true. Of course if you define "silicon valley" narrow enough you'll never see it. And it seems to me the people in SV do so. (You can always come up with a difference between SV and what ever place and say "see that doesn't qualify")

Also, the attitude and smugness of silicon valley is grating, and its' getting worse as your decline deepens.