"Windows 7 Enterprise edition offers advanced data protection, lower cost compliance and IT tools to streamline PC management and help save costs, while enabling access to information from anywhere for business users."
So, uh, why wouldn't all users want those things? Apple takes great pleasure in pointing out that they don't do this, that you get all the features they have in one version, but of course you have to buy Mac hardware to run it (ahem).
Anyone planning on installing W7? If I end up buying a PC, I'll likely go with W7 Ultimate (why miss out on Visual Notepad Extreme or whatever?). I just need to convince myself I actually need a PC.