There's been ever increasing pressure to drop Linux and move everything to Windows. #1 developing desktop applications for what industry increasingly pushes as an embedded operating system is a bad career move. #2 for $60 you can run win32 programs on Windows or Linux natively. The $300 for VMWare didn't fly with users. The $200 for a full Windows license was still too expensive. The $0 for wine wasn't worth the crashes.
By setting the $60 price point, Codeweavers is finally making windows a better development model than Unix more than any technical decision could have.