For a long time, if you wanted to watch someone else play Blizzard games live, Starcraft II was your only real option, with some WoW arena gaming popping up here and there. With the addition of Hearthstone: Heroes of Warcraft, and now the technical alpha of Heroes of the Storm, though, Blizzard has quickly grown their number of streamer-friendly titles.
Many of you are probably familiar with Jeffrey Shih, aka Trump, a Hearthstone streamer who currently makes his living doing just that--playing Hearthstone on Twitch.tv. He's one of a several streamers featured in a recent article on Mashable that discusses the state of gameplay streaming as both entertainment and work. Twitch currently partners with about 5100 streamers who make income from their gaming, and some, such as Trump, make enough to do it as a full-time job. If you're interested in gaming as a profession this is a neat article that discusses some of the realities of the work itself, as well as the factors that have made such work possible in the last few years.