Humongous exaggeration.
It still has a tiny market share, but it's definitely picking up in terms of adoption from the OEMs. By now virtually every Windows OEM also does Chromebooks. Especially the new HPs look really great (as in better than most Windows notebooks) and are really cheap. On amazon.com two Chromebooks have been at the top of the bestseller list for a long time. With ChromeOS now also getting offline apps it may be enough for most people. Combined with the low prices and the high visibility on sites like amazon.com it seems likely that ChromeOS will increase its market share in the future.