After 90nm ATI will not go directly to 65nm, instead they will first take a step to 80nm.
It usually takes about two years to shift a manufacturing process so it will definitely takes a lot of time until we see 80 or 65 nanometre graphic chips. We see 80 nanometre as a sub step, just like ATI shrank its chips from 130 first to 110 nanometre and now it is ready to go to 90 nanometre.More info at The Inquirer