Acer Aspire S5
Acer has claimed the title of world's thinnest Ultrabook with the Aspire S5; it measures just 15 mm at its thickest point and weighs under three pounds. The 13.3-inch notebook also comes with Acer's Green Instant On technology for fast boot and resume times, and Acer's Always Connect feature, which allows users to users to access media stored in the AcerCloud even when the Ultrabook is in sleep mode. The Aspire S5 also has a hidden "MagicFlip" I/O panel that boasts USB 3.0, HDMI, and Thunderbolt ports, among others. Acer's Ultrabook is powered by Intel Core processors and comes with SSD storage. The Aspire S5 will begin shipping in the second quarter, though pricing has not yet been announced.