Groundbreaking, innovative, trailblazing — these aren’t the type of adjectives you would think of to describe the typical shopping cart that gets pushed around physical stores. In fact, most of them look pretty similar from store to store. But, then again, you probably haven’t seen what a few enterprising retailers are up to when it comes to giving these awkward, shin-bruising staples of the brick-and-mortar retail world a new, high tech lease on life.