A leading Windows expert has dismissed Mac OS X as offering "nothing in the way of usability advancements over previous desktop operating systems".

Windows apologist Paul Thurrott has written several books about Microsoft operating systems. His statements are contained in a selection of answers to frequently asked questions about Microsoft's next significant operating system release, Longhorn, which will reportedly ship in 2005 or 2006.

Discussing the architecture of Longhorn, the author answers a FAQ question. This asks: "But Mac OS X already has a lot of (Longhorn's promised) features. What's the big deal?"

Thurrott responds: "Apple has implemented some basic desktop composition features in Mac OS X "Panther." But the basic problem with Mac OS X isn't going away: It's a classic desktop operating system that doesn't offer anything in the way of usability advancements over previous desktop operating systems.

"Today, Windows XP and its task-based interface are far superior to anything in Mac OS X. In the future, Longhorn will further distance Windows from OS X. From a graphical standpoint, there won't be any comparison. As Microsoft revealed at the PDC 2003 conference, Longhorn is far more impressive technically than Panther."