BillGates on TV : http://www.theregister.co.uk/2004/10/20/gates_interactive_tv_obsession/
Basically, a split screen with TV program at the top and "interactive" + adverts at the bottom. I suspect this is just a wild speculative punt. But might be worth his while trying. After-all, it worked for Bloomberg. I suppose if your idea of TV is something like CNN ...
Interesting comments on the actual state of TV in the article.
See also :