There's a digital divide among superstore chains in an era where digital delivery is rendering a lot of physical selling space obsolete. 

In this video, longtime Fool contributor Rick Munarriz explains why Bed Bath & Beyond (BBBY) and Costco (COST -0.36%) are holding up well at a time when Barnes & Noble (BKS) and Best Buy (BBY -1.31%) are turning to dramatic makeovers to remain relevant.