The Sneakers of Tomorrow are Hybrids.
The evolution of footwear has not been very significant throughout the past century. There is no use in making an effort. However, certain people keep trying despite the odds. We are unsure whether or not Walmart carries these sneaker/sandal hybrids or whether the individual who was seen wearing them was simply trying to make a point, but the situation is what it is.
Having said that, what are your thoughts on the amount of comfort these shoes provide and their functionality level? They could figure out a way to go shopping together in one form or another, and it was mutually convenient for them.