In just a short time, Activision Blizzard (NASDAQ:ATVI) will launch its new digital card game, Hearthstone: Heroes of Warcraft, on to Apple's (NASDAQ:AAPL) iPad -- and it could quickly become one of that device's biggest gaming hits.

Image source: Activision Blizzard.

In the video below, Fool contributor Demitrios Kalogeropoulos discusses why he thinks the game will be a blockbuster on the tablet. A spinoff of Blizzard's popular World of Warcraft franchise, Hearthstone has been developed with both seasoned and casual gamers in mind, he says. And that broad appeal, and established branding, should help the title dominate the download charts. It also can't hurt that the game is "ridiculously good." The best news for Activision investors, Demitrios argues, is that Hearthstone should generate substantial revenue for the company despite the fact that it is free to play.