Aero and Indigo are still there. It is not designed in .NET. Microsoft's not attempt at a Passort are there. It is not SP3 in the fact that it is built from Server 2003 mostly, not XP. It is also not SP3 because it is an amazing lighthouse for the masses of other Microsoft Products. Internet Explorer 7, while not specifically for it not, built from it, Office 2006/7 or whatever they call it, Visual Studio Orca, probably the full version of Microsoft AntiSpyware, more Security, more Stability, Aero of course, quicker and easier and more features. Service Packs are rarely more than huge Security Updates, Vista is a whole lot more.