I agree that the government cannot put an end to Bitcoin not because of the untraceable person/group of person behind the Bitcoin creation but because Bitcoin is decentralized. If you happen to know about torrents or decentralized file sharing, the government had been trying their best to stop such kind of file sharing, even catching people behind these torrent sites but still failed to put an end to this kind of activity.
I don't think that the identification of Satoshi will pose a treat to the Bitcoin industry. Bitcoin had been independent for years now, and had been booming even after the original creator had hid himself or does not publicly participate in the development of Bitcoin after his disappearance. Even with Satoshi surfacing, I do not think that the authority have the reason to apprehend him because of creating Bitcoin.