Samsung began selling ATIV Book 9 Plus in the US, its flagship Ultrabook. This 13-incher features a high-resolution 3200 x 1800-pixel screen, and a wedge-shaped aluminium unibody chassis. The US version runs a Core i7 "Haswell" chip with Iris Pro graphics, 8 GB of RAM, and 256 GB of SSD-based storage. No points for guessing which operating system it runs - Windows 8.1 Pro. Measuring 317.5 mm x 220.9 mm x 12.7 mm (folded), the ATIV Book 9 Plus weighs about 1.39 kg. It's priced at US $1,800.