To broaden your question, a government action to put in place a given industry ecosystem (innovative or not) has been done numerous times in the past decades. Actually it was a standard policy in Europe after WWII (e.g., Airbus in France). It's also the strategy that successful developing countries have put in place (e.g., IT offshoring in India, manufacturing in China, but also smaller countries like Morocco). But there has been a lot of failures too (e.g., Latin America in the 60's and 70's). The sucess cases have in common to align (lots of) money, political will, education system, infrastructure investments, tax breaks, etc. In other words, there is no silver bullet. Moreover, the “new ecosystem” tends to build on an “adjacent” pre-existing ecosystem and culture. In any case, it's really a long term investment.

For “fixed cost” industries, you also need a critical element: “natural market” with large scale. The latter explains why, for example, the US software industry was more successful than in any European country. Building on this software industry, the web sector came very naturally as an extension.
Based on this logic and considering that the web industry is slowly becoming a “variable cost” industry, I would argue that it is today less difficult to build web start-up ecosystems in new locations (though it will be difficult to reach Silicon Valley scale).