Acer was only willing to tease its Haswell-powered Chromebook at last month's Intel Developer Forum, but it's ready to spill the beans today. Now called the C720, the 11.6-inch system revolves around a more efficient 1.4GHz Celeron processor that (along with 4GB of low-power RAM) allows a healthy 8.5 hours of claimed battery life. The PC also ditches the hard drive of its ancestor; there's now a 16GB solid-state drive that improves responsiveness and helps Acer slim the design by 30 percent, to 0.75 inches thick. The company isn't saying just when the C720 will ship, but Amazon and Best Buy are both taking pre-orders today for a $250 based model that undercuts HP'sChromebook 11.