Jailbreaking or rooting your phone is pretty much a nerd birthright at this point. But soon it could once again be deemed illegal, if the acts' exemption to the Digital Millennium Copyright Act runs out. That's where you come in.
If that exemption runs out, it would be illegal to install a clean version of Android over top of carrier junkware or to jailbreak an iPhone so you can download apps outside of Apple's walled garden. Apple's fought especially hard to keep jailbreaking on the periphery of iOS, and we'd expect nothing less than a concerted effort on its part to stand in the way of an extension for the DMCA exception.