Earlier quoted context omitted.
You still literally don't need it. Which isn't to say that most people don't want it really really bad , but still, it's different, and words matter. Moreover, unless you're an extreme binge watcher, I'm guessing you could still consume more than you can eat of video entertainment for less money than the cable companies charge by buying DVDs. Let alone Netflix's DVD service.
>I'm guessing you could still consume more than you can eat of video entertainment for less money than the cable companies charge by buying DVDs. how? let's say you're on some expensive cable plan, $120/mo and DVDs cost $15. that works out to 8 movies a month, which might cut it if you only watch a couple of hours of TV on the weekends, but is nowhere enough if you watch daily.
DVDs are cheaper per hour if you get less-current movies or, even better, less-current TV collections (e.g., the Friends complete series is currently $70 on Amazon, for 80+ hours.)
So, if you are concerned merely with quantity of video content, it may be true that DVDs are cheaper than cable.
If you have concerns about the specific content, then the claim becomes harder to defend.