Are you already thinking to run the upcoming (well…2 years expected) Windows Hypervisor (codename Viridian) on your brand new 32bit server? Think again.
Ben Armstrong remembered us that since the WinHEC 2005 conference, Microsoft stated that upcoming virtualization hypervisor, based on codename Longhorn Server, will run just on 64bit processors, and just if they have virtualization support.
So better reconsider your orders and go for Intel Virtualization Technology (VT) or AMD with I/O Virtualization Technology CPUs.