what do you think CF would do other then look and sound cool? Devices that use their chasis as a heatsink (IE apple laptops) would cook if they were made of CF!
If this were true then it is as much a testament to Apple's poor thermal engineering as anything else. How is it that Sony and Lenovo manage to make laptops that are lighter, faster, and run cooler than Apple's, yet they use materials such as CF, polycarbonate, and magnesium?
What would CF do? A lot. Why are the world's fastest, lightest, most advanced cars, boats, and airplanes using CF extensively? Because it is extremely strong and light. CF would allow the MBA to be even lighter, while maintaining a very strong structure, and would most likely resist scratches and wear better than anodized aluminum. (I'm thinking of the very tough, matte finish that Thinkpads have on their palmrests).
Take the Lenovo X200 as an example: C2D 2.4 GHz, 12.1" 1280x800, weighs 2.95 lbs with 4-cell battery and only 3.24 lbs with 6-cell battery. So we have a laptop that is faster, lighter, more compact, and has better battery life than the MBA. And I can attest to the X200's excellent thermal management, i.e.,
it doesn't overheat!
Of course it looks butt-ugly compared to an MBA, and for a lot of customers, this would be a deterrent. It's like Lenovo engineers took the maxim
form follows function to its logical limits. Utilitarian, almost military-inspired, and the screen isn't as nice. At the same time, I like its "functional beauty", and the keyboard and matte black finish feel very high-quality.
If the MBA is EOL'd, then Apple is left with a gaping hole in the thin-and-light laptop class, and count me among those that don't think a tablet will be replacing a full-featured laptop any time soon. Considering that this is a nascent market, and very much the direction consumer laptops seems to be moving, I can't imagine Apple not having big plans for the MBA!