content: Considering the auto-update, all they need to do is make a change that reflects an alteration of the EULA and you're pretty much stuck with it.  Make a few tweaks to the kernel and toss on a new EULA for that and your choice is literally agreement or a system that can't legally be made to boot.  I'm not sure if this would hold up in court, but there are a lot of people who can't afford to sue to find out, let alone spend a year in court trying to hammer out the nitty-gritty, and who knows what kind of damage they could do in the meantime...