Imagine my surprise when Dell announced that the Duo was back, originally showing us the system behind closed doors this summer. The new version, now part of the high-end XPS line, has gotten a massive physical upgrade. Now it's ultrabook-thin, with a slim metal frame around its screen, and a button-free clickpad. The new version trades up to current-gen Intel Core i5 and Core i7 processors, along with solid-state-drive (SSD) storage, meaning that in terms of hardware it can stand toe-to-toe any mainstream ultrathin laptop.