This is not to say the auto segment has no ecommerce activity. But it is almost entirely limited to used-vehicle sales, mostly via sites like eBay and AutoTrader.com, and to parts sales. Without new-car sales in the mix, the auto sector will never play as large a role in the digital world as it does in the physical world. In fact, eMarketer forecasts that autos and parts will represent a lower percentage of overall ecommerce by 2016 than they do today. Read the rest at eMarketer.