Future of TV and Movies

I have been watching online TV Shows and Movies for quite some time now and I wonder what is keeping a service like HULU from acquiring a lot more movies for viewing online. I realize all the copyright jargin, but with the growing number of people watching videos online wouldn't be beneficial to have a more extensive library. I think the internet and the way we find entertainment will change drastically over the next five years. It seems that the internet is getting faster and faster. Hopefully soon we can enjoy High Def video online with our DSL service. I look for things like HULU to pop up all over the place and I hope that everyone is on board.