First the rumor mill revealed ASUS had plans to refresh Ultrabooks with Ivy Bridge and 1080p IPS displays. Then the company confirmed the news itself when it brought some new Zenbook Prime laptops out for a demo and promised they'd go on sale in ASUS' native Taiwan. Now we've got some splendid news for our readers here in the US: those fresh ultraportables are making their way stateside too eventually. ASUS just confirmed it's bringing four models to the states: the 11-inch UX21A, the 13-inch UX31A / UX32A and the UX32VD. What's