Not sure about the 64-bit issue, but definitely as PC's get faster, the programs will evolve or die. I agree with LD, I've recently started working with the Unreal Tournament editing toolkit, and its capabilities are mind-blowing. On top of the graphic functions, there are amazing sound capability, including surround sound (I'm an audio guy, and this is my primary function on one of my freelance client's game). Using UnrealEd led me to experiment with Machinima (the process of creating movies with games and game engines). It's amazing what you can do, easily. I haven't actually done anything useful for my own projects with it yet, but I will definitely be using it to supplement those projects in the future right alongside Poser and Bryce.