The major issue I see in all the discussion about super-clusters is the on-going political desire to float many geographic boats at the same time as stimulating public-private investment partnerships. Even Dominic Barton started to parrot the "a cluster can be situated in diverse geographic areas, such as Montreal, Winnipeg and Vancouver". Nonsense. A cluster is a compilation of talent, money and assets concentrated in such a way that they can integrate and collaborate easily. That's why Silicon Valley is so potent. Trying to keep many geographies "happy" by spreading the joy will only dilute and disable focus. Maybe Toronto-Waterloo works as an extended geographic cluster but let's get real. The "niches" are places as well as ideas.