Quoting from CNet News:
The hidden benefit from virtualization is that users can unpack a ready-to-run collection of software components–operating system and all–and drop it onto a fresh, empty partition of the computer called a virtual machine. No muss, no fuss, no driver updates, no configuration file tweaking, no conflicts with other software.
Virtualization essentially lets the companies selling the software handle the tricky part also provides a clean slate for installation.
Virtual installation will happen, but XenSource’s Crosby understands the change won’t happen overnight, “I think it’s going to be a fairly profound change for the industry to get there.”
Read the whole article at source.