I did a quick search and there have been 19 new threads with the word "virtual" in their titles in the past 24 months which is more than the previous year. It might be good to dedicate a forum to them because I never really know where they fit and the ones in the results of my search are all over the place, some are in the OS, some in All Other Software, some in Hardware, etc.
But I don't think it should include Sandboxie. I prefer to see Sandboxie in the General Security forum.
Bleeping Computer has one for "VM Machines and the programs used to create them" including VirtualBox, Huper-V, VMware Workstation and Parallels.
I also wonder where Zoom fits in because it's for virtual gatherings. I usually put those in Web & Email but it's an application so it can also go in the OS forum or even All Other Software I suppose. I don't know if that can be incorporated into the VM Machine forum if one were to be created.