The Silicon Valley cluster has a long history. Many decades ago Stanford engineering head Fred Terman encouraged his students to be entrepreneurs. An early example was Bill Hewlett and David Packard, who developed a vacuum tube gizmo in a Palo Alto garage. Hewlett Packard’s headquarters are still nearby on Page Mill Road. 

Governments do not create clusters, they evolve. Michael Porter’s 1990 book "The Competitive Advantage of Nations" focused on clusters. Since Porter ignored Canada, the Canadian government engaged him to prepare a paper on Canada. He found few clusters. One was close to my field, consulting engineering firms in Vancouver, but in 1990 it was dying.

Clusters evolve, not result from government action. There certainly are important roles for government: funding of basic research (including that of universities), ensuring access to higher education and establishing a good business environment, including taxation (Trudeau and Morneau may want to think about this one).