"Sam's Club's in-store experience is really smooth, easy, and elegant thanks to technology," our analyst Zak Stambor said on a recent "Behind the Numbers: Reimagining Retail" podcast.

From the staying power of self-checkouts to the growing integration of mobile, here are three trends shaping the way consumers are completing their in-store purchases.

Cashierless stores, like Amazon Go, have great potential to shake up the brick-and-mortar landscape. According to GPShopper, 48% of US internet users believe scan-and-go technology would make shopping easier. And 43% would rather try scan-and-go than wait in a checkout line.

Jason Goldberg, senior vice president of commerce at Publicis.Sapient, digs into the strategy behind Amazon Go and tells eMarketer how the ecommerce giant will further disrupt retail's competitive landscape.

Retailers often bank on new in-store features being transformative, only to be met with consumer resistance. So, what makes a shopper receptive to a retail innovation?