Also, the "right to root or jailbreak" you're referring to is just an exemption from DMCA liability if you do it (and correspondingly, agreement from the Copyright Office that it doesn't appear to be a copyright infringement when you do it for certain purposes). But if nobody finds a way to root or jailbreak a certain device, its users are still out of luck -- and if a manufacturer wants to sue jailbreak developers (who aren't protected by the DMCA exemption) or even users under some other theory, it can still try to do so.

So there might be some further tooth-and-nail fighting in users' future.