Every breed of it, morph, os4 and aros are playing catch up perpetually and they will never be able to match the amount of money, weight or mass thrown behind windows, linux and os x.
or NetBSD, Haiku, RiscOS, MiNT, Plan9, OpenVMS, Inferno, VxWorks, Minix, Reactos, eCS, Symbian... the list is endless.