Hmm, i wouldn't be so sure, since one of the slogans of Pascal (and i guess Delphi too) was "write once, compile anywhere" - i still think that FreePascal/Lazarus is a great choice for multi platform code, though personally i haven't exactly used Delphi in such a capacity to also make that claim.

I do think that you make a good point, however, since not everyone cares about cross platform much and in regards to "native" .NET options on Windows, i'd say that everything from WinForms to stuff like WPF is indeed pleasant. That said, many developers out there also can't afford to (or just shouldn't) ignore cross platform development, so options in that regard are also definitely worth talking about!