AMD isn't changing cards anytime soon, as they've been doing just fine with the hand they have. With their new chip architecture due out next year, AMD is sticking to all the same ingredients that have made their current line of 64-bit CPUs so popular.
"The new chip architecture--currently dubbed the Next Generation Processor Technology--enhances the design underlying the current Opteron, Turion and Athlon 64 chips. Performance will increase and AMD will keep a lid on power consumption, but the company has veered away from making radical conceptual changes in the overall blueprint. Processors built under the new design will come out in 2007."