This design choice is significant because most of these properties, or their equivalents, will be or are already implemented in several CSS3 rendering engines:

This design choice is significant because most of these properties, or their equivalents, will be or are already implemented in several CSS3 rendering engines: it's a great demonstration of what we will soon be able to do with cross-browser support. The fact that IE or browser x can't browse the iTunes store is less important than some other tactics on Apple's part such as lack of non Apple device support...