Amazon bought two things with Twitch: 1) A social community 2) a monetization model. The video service itself is secondary. The past several years has shown the social communities grow organically. But its hard to make users adopt one. If you build it, they probably won't come. It's easier for a big company to buy one up than start one from scratch. (Think Instagram versus Google Plus). Second, Twitch is one of the f…
Two additional aspects: 1) Twitch can leverage the core support network that amazon can build Starting from aws - to prime video subscriptions 2) amazon will go strong into tv top as soon as apple and google take it more serious. at that point the got one of the bigger kinds of content under control - similar w/ google and youtube
The iOS app definitely needs chrome cast support.