1) Incubation has experienced a renaissance since the dot-com crash, with the number of incubators growing since 2001.
2) Silicon Valley remains the largest startup ecosystem, followed by New York and London, based on factors like funding, founder experience, mentor availability, and startup success rates.
3) Incubators add value in the early stages of a startup's lifecycle by providing resources like mentoring, networking, and small amounts of seed funding to help startups prepare for launch.