Yes; I think you could have that situation with the present time and format shifting. Some of the new services that are coming in will ask you to pay for a version that lets you keep it for a specific amount of time, or you can just stream it. For DVDs, again, it's one copy, effectively, so you're not going to get a backup, right? If you want to back it up, you have to buy two copies.
On February 29th, 2012. See this statement in context.