Walk in to Apple Store.
Grab a Apple Watch band off the shelf
Swipe up on lock screen to auto open Apple Store app because it already knows I'm in the store.
Take picture of the band's bar code with app
Touch finger to home button to pay with apple pay
Walk out of store
This whole process probably took me less than 2 minutes..
We would shop at brick and mortar stores way more often if it were this easy everywhere!