ASUS Zenbook Prime review (UX51Vz): a blazing 15-inch Ultrabook with a lofty price

Windows 8 has ushered in an era of category-defying devices, with hybrid machines that bend, flip around, lie flat and otherwise contort flooding the market (and our offices). When virtually every Windows 8 product we've reviewed possesses acrobatic abilities, it's easy to forget regular ol' laptops are running Microsoft's new OS, too. One such machine is the $1,949 ASUS Zenbook UX51Vz (aka the U500), a 15-inch Ultrabook with the trappings of a multimedia powerhouse, including a quad-core Core i...