I'm not sure if Comcast will be streaming the super bowl online but you can check out more about Comcast Super Bowl coverage here. I did hear news about FOX streaming the game online, so you should be able to watch the Super Bowl online anyway if you have an internet connection.
http://www.sbnation.com/nfl/2014/1/23/5333296/super-bowl-xlviii-free-stream-online-mobile-app