Who needs the power in a portable computer?
1GB VRAM in a notebook? I don't even have that much in my MacPro!
I'm a freelance designer and web developer. I could really use the ability to work with complex Photoshop files and run a non-sluggish local webserver without being chained to my desk.
I understand that lot's of people use their laptops as a desktop computer (I myself did it for about a year), but the majority uses their laptop as a portable, which they are intended to be! I don't want to play Crysis in the train, but what I definitely need is a lightweight computer with a long lasting battery.
Doesn't the current Macbook fit that bill for those who don't need the extra processing power? And the 13" MBP? And the Air?
The 17" MBP is a little unwieldy as far as portability, but they make it and it sells, so obviously there are people who are willing to sacrifice a bit of portability for extra functionality.