Fault tolerance on Windows 2008

Fault tolerance had been recently added as an optional features on windows 2008 which provide a similar features to the Tandem Non Stop concept to minimize the system down time from minutes to seconds. As we notice, this technology will be down the road by VMWare on the next release ESX 4. I not sure whether Microsoft will consider to offer this in the virtual environment rather than the physical, as more users is more interesting in Virtual Vs Physical Servers today. Let's see what will be the next from Microsoft, innovative portion, I m glad to see this from Microsoft.