There's still a bunch of enterprise/government solutions for browser/endpoint isolation. Some use virtualization, but others use alternate methods. There's a long list of products out there but assessing the effectiveness is difficult unless one is willing to foot the bill to pentest robustly per TTP - let's say $3,000 for a robust test of each TTP. That's 500,000 Euros for coverage of all 227 techniques - IF - the security product covers all of them.
I could never have imagined that BufferZone would still be a functional company after all these years. I've heard Bromium is still out there too.