Acer has announced the new Aspire S5ultrabook just before their press conference at CES, which the company dubs as the world’s thinnest being only 15mm at its thickest point. The ultrabook comes in black, magnesium-alloy and brushed-metal and is 13.3″ at its thinnest point, weighing 1.35kg (2.97 pounds) and featuring Acer’s Instant On technology that brings the computer back from sleep in 1.5 seconds. It also uses Acer Always Connect, which lets users manage data on their computers even when the machine is asleep — the S5 can be woken up from a smartphone, and will immediately log into email and social network accounts. There’s a Thunderbolt port inside, capable of 20Gbps speeds, along with USB 3.0 and HDMI ports — all are hidden below the S5’s hinge, and can be accessed by pressing Acer’s new MagicFlip key. The computer is powered by an Intel Core processor, has SSD storage, uses Dolby Home Theater audio, and has a PowerSmart battery pack that Acer says will have a life cycle three times longer than normal batteries.

The S5 will start shipping from the the second quarter of this year and we still await the pricing details from Acer.