What is the meaning of Virtual PC Express?

A lot of interest exists around a special Virtual PC edition, called Express, which will be embedded in upcoming Microsoft desktop operating system Windows Vista. But worldwide press rarely talks about the product. Why?
Because Microsoft decided to offer it just for Enteprise Customers with Software Assurance.
The product will be also severely limitated, allowing just 1 virtual machines and missing support for Linux guest OSes.

In his post Brandon LeBlanc suggests to offer this edition for all Microsoft customers at a small add-on price but I disagree: comparing Microsoft offering to VMware one Virtual Server 2005 R2 can address competition with upcoming VMware Server, but there’s nothing to compete against the ubiquitous VMware Player.

I would rather consider a better move bundling Virtual PC Express with all Vista editions, as optional installation package, for free.