Yesterday i received my new laptop (Dell Vostro 1700) with Windows Server 2008 installed to it. Server 2008 is a great replacement for Vista. Windows Workstation 2008 has all the patches and fixes that are present in Vista SP1; runs all the same software but does it faster. InformationWeek calls Windows Workstation 2008 the “speediest and most secure version of Windows to come along in a decade.”
A great article about tuning you Server 2008 to a Super desktop: