Acer, the world’s third largest computer seller, said today that it will offer a new, low-cost laptop targeted primarily at emerging markets. Little is known about the model aside from the fact that will have a 7- or 9-inch display, cost about $470, and ship sometime in the second or third quarter. The specs and price would put it in direct competition with other low-cost models such as the Asus Eee PC and the Everex CloudBook, and to a lesser extent OLPC’s XO laptop.