I don't think he's referring to "virtual machines" (which I think tend to run one operating system 'within' another (ergo much more than the processor)). He's

I don't think he's referring to "virtual machines" (which I think tend to run one operating system 'within' another (ergo much more than the processor)). He's talking about programming languages which generally run in a virtual machine (e.g. the JVM) or other interpreted environments (e.g. ruby, javascript, et.al).