Nice idea but like you said they have a certain amount of control over your reading habits once you get one. I think that if I pay for a book I own it and can trade, read and share it with whoever I choose to. with paper I have that option no matter what, but with a digital book they can invade and charge you for these very same things.
I will stick with bound copy thank you.
__________________
"I'll keep my money, guns and freedom. You can keep the "Change."