Acer introduced a lower-cost version of its C720 Chromebook on Friday. The newest model is priced at $199. On the outside, the new laptop looks exactly like the previously available $249 model that we reviewed last month. Inside is the one single difference; this version has half of the internal memory of the higher priced model with 2 GB of RAM. Paired with the same Haswell-based Intel Celeron processor as its predecessor, the new C720 will still run for more than 8 hours on a single charge. The Chromebook will be available at Best Buy and online at Amazon.