Scoble's blog post's thesis was 'Google could never build Instagram.' He seems to have changed his argument: 'guys, you don't get it, Instagram is innovative!'
Clearly Instagram is on to something, and I think they are doing some innovative work, but that has nothing to do with whether or not Google could build this.
Also, a stopped clock is still right twice a day: sure, Scoble was right about Twitter (and possibly right about Foursquare...we'll see), but he seems to call everything innovative and exciting. The products that flop are swept under the rug and forgotten, and the ones that make it are trumpeted as evidence of prescience.
Because he can change your perception of the message a lot more narrating it than by writing it down (which is something cold). Or he's just lazy to type it.
http://twitter.com/#!/Scobleizer/status/3154038992412672