Brick and mortar stores need an online presence just as much as E-commerce sites need brick and mortars.
Historically, traditional and online retail have not played nice. The ecommerce boom exposed antiquated aspects of traditional retail. Lower prices and free shipping tipped the scales in favor of online shopping.
A prime example of this trend is retailer RadioShack's filing for bankruptcy. It seems the store with the nostalgic name could not compete against online giants like Amazon, with competitive pricing and two-day shipping options.