It’s not clear how well Chromebooks are selling overall, but there are indications that the concept is catching on with American PC users as more people move their digital lives online. Acer recently told Bloomberg that Chromebooks have, since November, accounted for 5 to 10 percent of Acer’s U.S. shipments . Samsung’s 11.6-inch Chromebook is currently the top-selling laptop on Amazon , and Lenovo believes its $429 ThinkPad-branded Chromebook will appeal to schools looking to make bulk purchases.