Matthew DiPietro, vice president of marketing at Twitch, said in the same press release that Minecraft has "struck a very powerful chord" with Twitch users. "Its constantly escalating popularity illustrates that people love to watch video games outside of the headline-grabbing eSports titles. Expect a watershed moment for both players and spectators once the ability to easily broadcast gameplay directly to Twitch goes live."
While this announcement is for PC and Mac users, it's important to note that the Xbox One will be getting its own version of Minecraft, and Twitch is integrated into Microsoft's next-gen system. So the possibility is there for Twitch streaming from a console version of the game. You know, unless a creeper comes by and blows everything up. Sssssssss.