http://www.youtube.com/watch?v=d2dhMKSKGBg
Word on the street, based on a Google+ post by developer François Beaufort, is that Google is developing a Retina-fied Chromebook featuring a 2,560-by-1,700 resolution (that's four million pixels for those counting). Surprisingly enough, it would file as the first Google-built notebook as today's Chromebooks are built by Samsung, Acer and Hewlett-Packard.
For reference, Apple's 13-inch MacBook Pro with Retina display has a 2,560-by-1,600 resolution (2,880-by-1,800 on the 15-inch variant). Unlike the MacBook Pro, this so-called Chromebook Pixel will apparently have touch capabilities of some sort...