The 80GB is a single platter HD, the 160GB a dual platter. I've heard nothing about anyone having a 160GB single platter 1.8" hard drive in development
The 80GB is a single platter HD, the 160GB a dual platter. I've heard nothing about anyone having a 160GB single platter 1.8" hard drive in development
Toshiba is supposedly working on a single-platter 160 GB HD in the 1.8" form factor, but it's not due out until 2009.
And in case anyone wants specifics, the single-platter 80 GB 1.8" HD in the MBA is 5mm thick; the dual-platter, 160 GB 1.8" HD in the iPod Classic is 8 mm thick... 60% thicker, 3mm of extra space that the MBA simply doesn't have inside.