That's just one example of how they aren't the same thing. Some software will run in the Metro--or Windows 8 Style UI--while other software will only run in desktop mode. The will only be capable of running the Windows 8 Style UI apps, so it's a crucial distinction moving forward.

I suppose we could just refer to the default, no-longer-referred-to-as-"Metro" interface as Windows 8, and the traditional desktop mode as Windows 7 since that is sort of how it feels. Somehow I don't think that branding is what Microsoft has in mind, though.

I never really liked the name Metro anyway. It was growing on me, and I didn't have any better ideas off the top of my head--but when the Metro name was first revealed I was decidedly underwhelmed.

How about "Windows 8 RT-mode"?