Acer has unveiled its third-generation Timeline X notebooks in Taiwan today, including 13.3 (3830TG), 14.4 (4830TG) and 15.6-inch (5830TG) iterations. While we're on that subject, it's worth noting that the battery is no longer removable. Besides Sandy Bridge's added horsepower and efficiency, the revamped Timeline X series has received a chiclet-style keyboard, an extra mouse button, and slightly refined aesthetics such as straight edges around the chassis instead of tapered ones. Pricing starts at roughly $1,133 and US availability is unknown.