That article is a few years old and the laws have changed in at least CO. Grocery stores can now all sell full strength beer so there's no 3.2 any more here.
Most grocery stores near me (in MN) have added separate liquor stores that are attached, but separated. But then they also still sell 3.2 beer in the main portion of the store. Seems weird to me. I assume it will disappear if they think of something better to put on the shelf.