I expect that the CO will leave all issues regarding the boundaries of what is copyrighted and what is not to the litigants in much the same way that patent 'quality' issues are left to litigants. So really, not much is changing other than the strengthening of the idea that non-persons cannot be the author of copyrightable works.

Generations of law students will write on to their law reviews by rehashing this issue. Yecch.