When I first read your post, I didn't see the second question. I interpreted the first as, "What is it important to know for startups in order to be successful?

When I first read your post, I didn't see the second question. I interpreted the first as, "What is it important to know for startups in order to be successful?" Then you state your second question as, "Which field of CS do you think that with a little more time will result in the largest number of new innovative startups?" My answer to this isn't specific to CS, but IT as a whole. The next big breakthroughs are going to come from the field of nano technologies. In this space, you will see some innovative startups.