Active Desktop and MS DHTML was awesome. Insecure as hell for "consumers", but awesome. VBscript/Wscript on/in the desktop as an application was really useful.
My introduction to containers was HP-UX Vaults.
But there wouldn't have been the hardware, resources, or depth of support available for the end user in the 2000s. There are still non-technical folks I deal w/ at work that don't get what a VM is...
same as virtual machines were a thing in the early 70s and client-server in the 80s, but not for the target market despite the industry thought so for some time