I know what you mean, but remember what the intention is behind it. The concept 'art', is yes, just for it self art, no doubts about that. It looks awesome and all that. But it isn't just made for artistic purpose, you have to keep the whole picture in mind, many concept artists see them self rather as designers rather then artists. I do admit that it is a bit wonky and strange. But tryto think about it this way. When someone like Todd Howard goes to his concept artists, he gives them a clear goal, like 'we want the game to feel like full of Vikings and that shit! WIth Dragons and all that!'. And then they go to work, looking at references, making thousands of images, styles, characters, creatures you name it, and then they show it to their art director, or to Todd himself, and he decides which work goes in to production. It is not unlike what you have when you 'design' a website for a client for example. You're trying to solve a problem, not just making a website for the heck of it. To use websites as examples, you clearly have websites out there, that might be art, I think you can make that argument, particularly websites which are made as portofilions can be pretty creative work! But, they are not the same like a really well done corporate website, which was made with a clear intention. To sell a product.
To make it short, in my opinion the intention behind the work, matters a lot. And you cleary see that with games like Skyrim, Fallout 4, Assasins Creed, and many other high quality AAA games. They have great concept art behind it and some really great designs, but at the end of the day, the are part of a product and not really much more of an 'art'-work like the design of a kellogg's package.
