While termination rights sound important, it also sounds like it has the potential to torpedo any open source software that isn’t in the public domain. Though I suspect it would be impossible to track down all the original parties who originally licensed the contribution to be able to yoink it (as the law requires). Of course I can imagine a judge ruling that taking out ads (online, tv, radio, etc) putting everyone on notice was sufficient to satisfy the law, or that the laws requirement in OSS situations was onerous and could be waved.
Speaking of public domain, what happens if the person who buys the copyrights puts the content into the public domain? Does it leave the public domain? Did congress kill public domain 36 years ago and we not notice?
I think OSS is in trouble, particularly FOSS. I am loath to say it but this part of TPP has a plus side.