However, what if you received flooding information 45 minutes before it happens in your area. (I'm from the Philippines and we experienced heavy flooding recently and my house was nearly flooded b/c the "normal" news channels didn't know how bad it got before it got really bad). Of course, that's just one example.
Point is the power of Internet/twitter allows for breaking news that might be relevant to you and might give you enough time to avoid disaster, etc.