ULTRABOOKS
Ultrabooks are a relatively new breed of stylish, lightweight laptop that may within a few years replace most larger and heavier models. To be called an ultrabook, a laptop has comply with a hardware specification laid down by Intel. This requires laptop manufacturers to shrink their computers to less than 21mm thick, to make them resume from sleep in just few seconds, to provide at least five hours of battery life, and to include anti-theft technology. Many ultrabooks also use a solid state drive (SSD) rather than a traditional, spinning hard disk, weigh not much more than a kilogram, and are housed in a designer casing made from a material such as an aluminium alloy or carbon fibre.
Many of the latest ultrabooks feature touchscreens to make best use of Windows 8. A few ultrabooks are also labelled as "convertibles". This means that they can transform from a standard laptop/ultrabook form factor into a tablet device by somehow rotating and/or folding back their screen so that it rests flat on the top of the device. You can see some such models here.