Maybe if nothing better comes along by the end 2012, then Blu Ray will eventually take over. Time will tell...
IMO, it's not a big enough improvement over DVD (and has some minor disadvantages in terms of price) that most of the consumers don't really want it, or don't care. Maybe the industry can force it, but that still takes time.
Digital Download is the only one of the above that would have any potential of outnumbering DVD/Blu Ray, and I don't see that happening by the end of 2012.








