The number of people that have projection systems is minuscule and wouldn't move the needle much. Even here I think the percentage of people with such systems are in the distinct minority.
It's simple, many of us have been purchasing digitals from iTunes and Vudu at cheaper prices for years so we feel there is no need to rent these $20 movies when we can just wait a few months or so before purchasing them digitally for half the price. Our disc and digital libraries are...