Things are not very great for multimedia on the net today. Bandwidth available to a common user is not enough to deliver the real strength of multimeida.
Content available is not short but the band width is.
Optical fibers will be dominent in the future. And websites are going to flash again with MultiMedia...The greatest power to advertise.
In advertisement too multimedia will dominate as we are seeing even today - the new advertisements. In future, ads are going to be man-free OR no-man ads. As software products like Maya are utilized to a greater extent.