I'm not saying that I disagree with the general assessment (right now), but the line of reasoning is a bit odd. "At its core"? Well, the GNOME people did get quite a bit flack for ignoring the nerdy needs. Or are we talking technical terms? OS X is based on unix underpinnings, too. I'd argue that even Windows isn't as un-nerdy as some people might think. Most people aren't too happy about using it beyond what their work required, and then to a very superficial degree (browsers + media). (His target demographic of gamers being one noticeable exception)

That's one of the reason why mobile devices (phones/tablets) are so popular, they're basically the first un-nerdy computing devices.