We're a jaded bunch here at Engadget sometimes, and with most of us using SSD-based systems these days it's hard to get too excited about good old spinny disks. Still we're also suckers for impressive technology, so our interest was piqued when Western Digital announced its 5mm thin 2.5-inch hard drives the other day. Luckily, the company saw fit to bring samples of its skinny new WD Black hybrid drive and WD Blue HDD to IDF 2012 and let us handle both briefly. The verdict? Th
