I know this thread is old, but I'm surprised the movie/tv studios are still putting DRM on purchased video files. If they are concerned about the files leaking out online they aren't doing much about it because there is software to remove DRM from itunes files and they can be found all over the internet. Plus, most people will just download a Blu-ray rip for a movie because it's higher quality. The only people they end up hurting and inconveniencing in the end is legitimate paying customers. Meanwhile pirates just remove the DRM and can play it on any device for free. Legit customers have to pay and can only play it on the devices that company specifies. It's a lose-lose situation.
Would you rather pay a $10,000 fine, or invest into a $99 Apple TV? Honestly, it's stupid that people would rather risk getting slammed for illegally obtained content, instead of doing what really needs to be done here.
The real reason of having DRM is to keep people from sharing within their group of friends. A lot of people let their intermediate friends share their Netflix account. A lot of people share their music.
"Sharing is caring" does not apply to the entertainment industry. You let it be done, and you lose revenue because then people will come up with a way to spread the costs among friends and family which easily can lose studios about $100 per movie within a group. College kids would just put it on a public server for the whole school to grab from, just like they did with their iTunes Library when people still bothered with them.