I think a very significant accomplice in this 'crime' is the film industry, who very rarely produce anything that you would want to watch twice, really. Maybe I'm just too critical, but I can't really think of anything out of Hollywood that I cared to watch more than once - well, maybe there are a couple from long ago, but what I nearly always find lacking is something that is a bit original and feels convincing; regrettably, what you mostly get is a rehash of the same, old plot with a bit more in the way of spectacular (but strangely unconvincing) effects. That being the case, why would you actually want to have a stack of DVDs cluttering some shelf? Netflix and similar are perfect for this: you watch a film once and forget about it; incidentally, cinema is well suited for this as well, plus you don't need to have a spectacular home-cinema taking up space. This is probably why cinemas haven't disappeared, and why they may be seeing a bit of a renaissance atm.