Re: maybe considering the knowledge of joe sixpack it comes down to 64-is-better-than-32 versus 2-is-better-than-1.
You are oversimplifying the marketing message. In reality, there will be various marketing angles from Intel and AMD, and in the end, it will be up to whose marketing teams do a better job reaching the end-user. In the past, Intel's marketing teams have wiped the floor with AMD's, though AMD is starting to get better. We will see soon whether Intel can market dual core without letting 64-bits get in the way.