As a very competitive new force in the notebook market, the ultrabook sales in 2011 accounted for only 20% of the mobile computer market sales, which was lower than the expected 30%. Some suppliers said that the reason why the ultrabook encountered a sluggish sales is very large. To a certain extent, the demand for ultrabooks in the European market is too small. Surveys show that European consumers generally prefer laptops with a size of 15 inches and above. According to data, 40% to 45% of mobile computers sold in Europe are currently It is a 15-inch model, and the ultrabook does not have such a size at all. The premise of the supplier's conclusions is:. ['he manufacturer did not consider the usage habits of European consumers before production.', 'Superbooks should be designed to produce 15-inch products.', 'Consumption habits of European consumers are similar to those in other regions.', 'European market accounts for a larger proportion of the global notebook market.']