I don't think GPL will help in the software repair space, at all. If they are able to get Vizio to distribute their source code for this, I forsee Vizio just do

I don't think GPL will help in the software repair space, at all. If they are able to get Vizio to distribute their source code for this, I forsee Vizio just doing a clean room rewrite to move away from the codebase... and even more companies will never touch anything GPL with a 10-foot pole. Software repair will come from different kind of regulations, not from bullying companies for not being careful with software licenses. (Sidenote: if you use GitHub, the Insights page can help you find out whether one of your dependencies use GPL, so that you can seek alternatives).