One of the most important things Microsoft has to do right now is a WinRT desktop, and more WinRT APIs to kill Win32. If they figure out a way to virtualize Win32 apps, they can then switch the OS to a completely different one (Midori) and apps won't notice.
Why would (or should, for that matter) WinRT kill (as opposed to compliment) Win32? Yes - Win32 is an older API; however, there are still things that the Win32 API does that the WinRT API and its progeny can't, don't and (most importantly) won't be capable of doing - ever. While WindowsRT doesn't support Win32, it's not supposed to! WindowsRT is a *subset* OS, while Windows 8 (you know, that *flop* that's grabbed 40 million licenses since RTM) is a a *superset* OS.
Here's some food for thought (for the detractors) - could it be that the reason *why* Windows 8 has that many licenses already is *because* it's a superset OS - that it's more than Win32?