There is no doubt 64-bits is nice architectural change but it doesn’t mean you’re receiving all the benefits of the change. If Apple doesn’t quickly upgrade it’s vast stable of killer multimedia applications, it doesn’t really matter how good Snow Leopard is. Even after installing Snow Leopard it is hard for me to notice a significant difference. I would settle for some extra quickness or capability in iLife that wasn’t possible before Snow Leopard.
Add to this the fact you need a full 64-bit clean environment to really guarantee you are in 64bit mode. The boot-up environment known as EFI was n ot 64-bit clean until after 2008. The Intel CPU wasn’t 64-bit clean until after 2007. Two strikes against me as I was an early adopter of the Intel Architecture and am relegated to good ol’ 32-bit compatibility mode. Unless I decide to upgrade of course, which isn’t going to happen because I have a sworn duty to first replace my wife’s old PC after Windows 7 is formally released. Once that purchase is done and out of the way, then I will consider getting a re-furbished post 2008 Mac Pro tower with a fully OpenCL compatible graphics card. There’s just so many considerations, you need to keep writing all of them down so you don’t lose track.
Of course, Apple itself needs to deliver 64-bit versions of its own Logic Studio, Final Cut Studio, and Aperture, too. The company was previously outpaced by its third party developers in the move to PowerPC, and to a lesser extent, in the move to Intel Macs. Apple’s position as both a platform vendor and an application developer should help it to deliver practical, usable tools for its own developers.