Haven’t bought your Ultrabook yet? Here’s another manufacturer hoping to entice you with its wares. NEC has announced its own Ultrabook, the LaVie Z. You can expect to see the same Intel guts in all the other Ultrabooks, but NEC is using some premium materials for its own version. The case is constructed from a lithium-magnesium alloy, which makes it durable and light too: just 2.2 lbs.