Container Park has a bunch of very narrowly focused businesses, in a small, 2-story space with insufficient traffic to support them. There was nothing resembling an "anchor" store to draw crowds and get this place going. As a result, it just seemed dead, lackluster.
Downtown LV is quite far from the strip, so tourists aren't going to stumble on it. And it's not even in the heart of downtown LV. To get there, you have to make a point of going there. And of course, LV makes it very tempting to stay in the big hotels and not venture all that far.
Some examples of the businesses: There was one store devoted entirely (I think) to socks. Another sold groceries, locally produced art, and art supplies. One store sold used designer bags and shoes. There were a few bars and restaurants, but nothing I'd go out of my way to patronize. In general: an odd collection of niche stores, with a few places to eat and drink.