In a phone interview, James Bruce, wireless segment manager for ARM confirmed that, "You'll definitely see handsets shipping with a dual-core A9 in 2010,"
The next-generation Cortex-A9 processor from ARM is 45-nanometer as opposed to the (current) 65 nanometer process. It is more power efficient than the A8 so even with a 10 to 20 percent increase in power consumption you will see better battery life.
The Cortex-A9 also sees a huge increase in performance. With the A8 "You're getting a 2X increase (over the previous ARM design). And actually the A9 takes that even further, It's a superscalar design but it's also an out-of-order design as well. There is some out-of-order aspects with the A8 but the A9 is a very aggressive out-of-order processor," he said.