While the last statement is true, the rest of it is changing. The studios are now bringing in people who ARE web savvy, and are letting them have some freedom. Of course, most, if not all, studio web sites are purely promotional and exist solely to sell you something connected with properties owned by the studios. But there is some creativity being exhibited in their execution. Like being at a party, you will be able to either sit back and enjoy the passing show, or get actively involved.
People primarily use the web because it's convenient and saves time.
In perhaps three to five years, when enough bandwidth has been established to allow for full-motion video that can be quickly downloaded, widespread entertainment on the web will be a reality. It just may not look like what we have come to know as entertainment in the traditional sense.