A question I have ofter pondered, after using my 40D for 2 years and getting to know how to use a DSLR and learning how to expose pictures right and all that, is why is there a need for cameras to have these unbelievably high ISO capabilites. Now I don't claim to be some professional photographer who knows everything there is to know about it, but once I learned about ISO and what it does, and how to take pictures in low light at least to the level I am at, I never used anything over ISO 100 or saw the need to. In my mind, all it does is create noise, and if you are taking pictures in low light, you should be more concerned with a tripod then ISO capabilites.
Am I way off base here? pherhaps, but what is the general opinion on it here. Cause I cant help but laugh when I see these new DSLR cameras touting their ISO numbers. I feel like It would never actually be needed by anyone using it