You're forgetting about Microsoft's downgrade rights. As long as you have a valid OEM Vista Business, Ultimate or any OLP, VLP, you can make user of the downgrade and use a previous OS.
http://download.microsoft.com/download/d/2/3/d23b9 533-169d-4996-b198-7b9d3fe15611/downgrade_chart.do c
It is more restrictive then the previous downgrade for WinXP Pro which allowed any corp with OEM WinXP Pro to use Win2k, though. However, any company that uses MOLP is fine and pretty much every IT shop will just rip out Vista and re-image WinXP using this downgrade for quite some time.
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You're forgetting about Microsoft's downgrade rights. As long as you have a valid OEM Vista Business, Ultimate or any OLP, VLP, you can make user of the downgrade and use a previous OS. http://download.microsoft.com/download/d/2/3/d23b9 533-169d-4996-b198-7b9d3fe15611/downgrade_chart.do c
It is more restrictive then the previous downgrade for WinXP Pro which allowed any corp with OEM WinXP Pro to use Win2k, though. However, any company that uses MOLP is fine and pretty much every IT shop will just rip out Vista and re-image WinXP using this downgrade for quite some time.