Sourdate, it's not just the great OIS on the HV20, it's the great OIS coupled with the great picture quality with very low noise in most shooting situations. That's the combination that spells a great video-taking experience. Oh, and did you know that the HV20 also has zebras & manual control? I don't think you understand that people that buy cameras like the JVC, Canon or Sonys are not, for the most part, doing so for professional reasons. Yes, some buy the HV20 as a "B roll" camera, but those are in the minority. They're buying the JVCs, Sonys and Caonons for shooting family gatherings, fun type events and general casual shooting. People will not, repeat not, carry a tripod with them everywhere they go.
So in the end, it is extremely important that a good image stabilization system be built into the camera if good videos are to be shot.