[1] - http://blog.nielsen.com/nielsenwire/media_entertainment/numb...
What is interesting is that I know a lot of people who share Netflix accounts across households. I wouldn't be surprised if the percentage of Americans who use Netflix is closer to 25%.
They went back on that decision after the predictable outrage exceeded their threshold.
OTOH, this was only vaguely better when we had cable. (You could have user-specific channel lists, but it was annoying to access them. And even still, there was no way to outright remove channels from the main list - is it really necessarily for me (or my kids) to see what's currently playing on the adult channels I don't subscribe to?)
Q. Can I watch movies instantly on more than one PC or Netflix-ready device?
A. ... If you are on the Watch Instantly Unlimited plan or the 1-disc-out-at-a-time plan, you may watch only one device at a time. If you are on the 2-discs-out-at-a-time plan, you may watch on up to two devices at a time. Members on the 3-disc plan can watch on up to three devices. The maximum is four devices -- available for members on the 4-or-greater-discs-out-at-a-time plan.
Your account can have up to six unique authorized devices activated (and associated with it) at any given time, including personal computers and Netflix-ready devices. For example, if you're on the 1-disc plan, you can have up to six devices associated with your account, but you can only watch one of them at a time. If you're on the 2-disc plan, you can have up to six devices activated but can only watch two of them at the same time.
0: http://www.timefordvd.com/netflix/NetflixPricePlans.shtml
But, I don't know if there are no restrictions, or if there are "only 1 device type at a time."