If intel were to build a 64-bit processor for a PC then they would have pay AMD to use their copyright,(AMD has copyrighted the 64-bit processor) and Intell would never pay AMD. So the only thing Intel can do is build a duel 32-bit processor to fit into one CPU, and I do not think they are going to do that. They might as well come up with a 128-bit processor.(that would be cool) But on the other hand they might if longhorn only supports 64-bit processors. It is a complicated issue.