That's a good point. And I can understand that Apple, esp. if they are targeting creative / ad people, are probably aiming for a completely professional look (v. Flash, etc.). Until the other browsers catch up, I suppose they have every justification for doing what they're doing. One could argue, that they don't want browsers that aren't fully conforming which might give a bad impression of the viability of this post-Flash world.
On the other hand, browser sniffing, as you mention, is a slippery slope. Maybe all they might do is acknowledge that until other browsers have fully implemented 3D CSS, etc., they are only recommending Safari.
ETA: Never mind, I went back and read the page:
Not all browsers offer this support. But soon other modern browsers will take advantage of these same web standards — and the amazing things they enable web designers to do.
On the other hand, browser sniffing, as you mention, is a slippery slope. Maybe all they might do is acknowledge that until other browsers have fully implemented 3D CSS, etc., they are only recommending Safari.
ETA: Never mind, I went back and read the page:
Not all browsers offer this support. But soon other modern browsers will take advantage of these same web standards — and the amazing things they enable web designers to do.
Good enough I suppose...