Are you going to be willing to install a brain implant from Facebook? Dear God. It's like something out of a dystopian movie. No amount of money will convince me to do something like this, especially coming from Facebook, but any corporation really.
Very light AR glasses can be an interesting proposition but they will not provide the VR immersive experience.
I'm not sure what people expect from VR but it's not Ready Player One and will not be for a very long time. However, playing Half Life Alyx is quite phenomenal even today on current hardware.