Wow. Two misinformed comments already. Did you guys even know how the root is maintained? Or, even better, did you even read the part of the article where it explains how root will be achieved, even with these checks in place?
The only thing this will block will be un-authorized rooting processes that use exploits to achieve root, possibly without even the owner's consent. Only via consent (a.k.a. unlocking bootloader) rooting will be maintained. A good step forward, IMO. Remember the websites that promised root just by clicking on a link? Gone. And that's a good thing. If you want to root your phone (I use to do that all the time, but nowadays, with the plethora of customizations that Android offers, not needed anymore), you will still be able to do it, but you really have to be willing to do it and know what you're doing. Amateurs will be deterred, and that's another good thing.