One avenue that could be taken by the companies to mitigate any loss of voice service. Customer would be just changing the point they plug the phone in, socket wise and that would be that.
I had a Draytek 2910vg 10 years ago doing exactly that, so very very doable. But then, that was always a solution under the existing criteria and with that, this change just allows companies to not offer that solution. Which does raise one question - will customers be able to keep their existing number and port it to a VOIP provider of their choice? That is one aspect that could of been covered in these changes. That would certainly open up the markets and in a good way.