Very interest post by Allen Bauer on the problems Delphi is facing in supporting WinRT... or, as he puts it, "Windows 8 Little Dirty Secret". This is a very interesting reading. And yes, this is somehow similar to the problems with browsers: IE is allowed to do operations third party WinRT browsers cannot. Which is a bit undari and likley to cause some stirs in Europe (you might remember I blogged about Microsoft "forgetting" to follow the agreed EU antitrust requests for browsers).
The original post is here: https://forums.embarcadero.com/message.jspa?messageID=484319#484319
A good summary is at: http://delphitools.info/2012/08/23/why-no-native-winrt-support-in-delphi-xe3/
With my (imprecise) comment and David Heffernan correction: