Even if you buy a movie on Apple’s iTunes store that doesn’t necessarily mean you own it in perpetuity.
You don’t need to go to the video store or a retail outlet to get the latest movies on home video.
As one Canadian iTunes customer recently learned, it doesn’t even require a situation that drastic to lose access to something you’ve “purchased” on iTunes.
A digital storefront never runs out of stock of the big new releases the way a brick-and-mortal retailer might.