At what point will browsing via a VPN become the de-facto way of using the web ?
People (as in, the general public and a surprisingly large fraction of those that should know better) simply do not care.
I have some doubt that the consumer observes this discount.
If consumers insisted on privacy-by-default, the point of sale cost would not be very different. It's just the industry standard not to provide this.
If we observe a steep discount now, it's because privacy-by-default has become a specialist interest that manufacturers can therefore charge extra for.
If people refuse to buy it due to privacy issues, they'll segment it by some other feature.