The chief of streaming-TV start-up Aereo has said his mission to bring unbundled broadcast TV to the Internet has greater stakes than just the fate of his company — and it’s the crusaders, taking on those with power, who fill graveyards. Aereo CEO Chet Kanojia may end up correct on both counts. A 6-3 Supreme Court decision Wednesday found that Aereo, whose antenna-plus-cloud-storage technology streams over-the-air TV signals, is illegal if it continues to operate without paying broadcasters any fees. It handed a victory to the networks’ owners, some of the biggest media companies in the world, in their fight to shut it down. The decision kills Aereo as we know it, but it may affect more than just one service operating in just 13 cities for little more than an analyst-estimated 100,000 subscribers.