This is a great forum topic. Since some people dismissed video on DSLRs as a gimmick without much practical use, I thought I would never use the video features on my video capable DSLRs. I figured for the situations I'll want or need video, I'll use my video camera. A few years later, I have over 1 TB worth of video shot with SLRs!
I can understand why people don't use the video feature - without a rig, or stabilization equipment of some sort, the video can be a bit shaky unless you really dedicate time to improving handholding techniques to get useable video. Once you do that though, it's completely worth it. The quality of the footage you can capture is remarkable...and in some unexpected moments, I've been able to capture priceless moments that still pictures wouldn't be able to truly do justice for.
In retrospect, I think it's great that video is on new DSLRs, because I think it opened up a new world to many photographers who wouldn't have considered shooting video before. In the same way getting a macro lens makes you pay attention to all the small things that might previously have gone unnoticed, trying to master video techniques undoubtedly has given even seasoned photographers something new to strive for.