I think maybe the OS X HIG is still in place, but it is migrating to the iOS HIG. We will increasingly see more and more apps falling over to the iOS "dark side" and culminating with the release of Lion.
Personally, while I loved my iPhone and think the iOS is a great thing on a small screen I'm not a big fan of the iPad. Let me re-phrase that, I'm not a big fan of the iPad's launcher. Anyway, Lion will be a big UI step, probably in the direction of iOS and away from OS X. That kind of makes me sad and worried about the future of Mac products. On the other hand, I'm very happily a Ubuntu and Android user and maybe they will pick up the torch and grow better and better.
Personally, while I loved my iPhone and think the iOS is a great thing on a small screen I'm not a big fan of the iPad. Let me re-phrase that, I'm not a big fan of the iPad's launcher. Anyway, Lion will be a big UI step, probably in the direction of iOS and away from OS X. That kind of makes me sad and worried about the future of Mac products. On the other hand, I'm very happily a Ubuntu and Android user and maybe they will pick up the torch and grow better and better.