I am not sure what the actual question is here but if you are referring to David Klee's presentation you can re-watch it on PassTV here.
The main point I think he is trying to make is to monitor your metrics of that virtual machine and host machine to make sure you sized your VM resources properly for a SQL Server instance. There is no one size fits all scenario to go by as is more common to do.
Shawn Melton
Twitter: @wsmelton
Blog: wsmelton.github.com
Github: wsmelton