At CES, I was talking to an Intel representative.
I asked him, "Will Apple be using the Centrino Duo chip on their laptop?"
He replied with a big smile, "You'll just have to wait and see."
The Centrino Duo allows you to multitask on your laptop AND increases the battery life to something like 4-5 hours.
I would LOVE to have a laptop like that, if it also supported my Final Cut Pro software in native mode.