No surprises here. Once I heard a friend of my sister-in-law was getting a 17"MBPro. I jumped up and told her to call her friend and tell her "STOP!!" I argued that there aren't any advantages that the 17" offers, other than a bigger screen and a bit more L3 cache. In fact, there are more disadvantages:
heavier
no SD card slot (which she uses a lot, and Express card slot attachments are overpriced).
costs quite a bit more
heavier
bulkier
heavier
OK... the bottom line is it's just heavier and bulkier -- and costs more! I told her than with the cash she'd save getting a 15" with a matte hi-res screen, she can get an external 24" LED screen and still have a bit more for a 3rd party RAM upgrade.
People in the know... know this stuff. Others fall prey to sales people.
As for the next-gen MBPros... better to get the current ones so you have better upgrade options in terms of RAM and hard disk space! You won't be able to replace/upgrade these things in the next-gen model if they DO go the way of the Macbook Air!! Remember -- you can stuff TWO internal drives into a current 15" Macbook Pro (by sacrificing the optical drive to one), solid-state or not (and the SSD would be cheaper than 'upgrading' it on the Apple Store Online)!