What will 64 bit support bring to Leopard?

[ricgnzlzcr]

Now that WWDC keynote has passed, what does 64 bit support bring to the table? I thought that Tiger had that support as well. Are there any 64 bit applications out? Will all the software included in Leopard be 64 bit such as safari, iphoto, and all that jazz? What will be the speed difference if someone has a 32 bit processor?

Too many questions!

 

[wako]

theoretically it is suppose to be 2x faster. however after toying with XP x64 I can say it is not that much faster and to me not even noticeable.