From the consumers point of view, the iPod AV is a more exciting prospect, but considering the extra features we could potentially see over the next 12 months in the Powerbook range, I am very excited by that.
Personally I am not so bothered by the HD screens just yet, (ignoring whether they are currently HD or not), I would just like them to stick with the current screens and bump up the brightness. I would dread to think what would happen if they switched over to x-brite screens, as I don't think they are as nice to work with. I would also like to see apple take the lead and start announcing products for the next level of airport. When I eventually get around to it, I plan on networking my house up using Pre-N rather than 802.11g, it would be such a shame if I had to have my laptop closer to my router than my PowerBook.