They are copying the style of old classic book binding. Looking at those images filled me with the memory of the smell of old books and leather. I have a Lord of the Rings + Hobbit set all nicely leather bound with gold lettering inlaid. Very nice and probably worth a pretty penny.
My folks have a few nice sets of classic fairy tales and stories with similar designs. I'm glad to see new books taking a similar path.
I can see games following suit. If it weren't for the cost, I'd be all over some of these limited print runs of games, but I'm drifting towards all digital for convenience. Though my roots keep telling me to buy physical for the usual crotchety old reasons (shelf candy, preservation and long-term accessibility, some form of true ownership of the title that cannot be revoked, etc).
I kinda wish there was a way to have our cake and eat it too, like being able to buy physical and get it available digitally for free. Amazon does that for music, if I buy a CD they give me access to the music on their music app. I don't have to be paying for Prime I believe, it came with the purchase. though I've not tried to listen to any of it on there since I dropped Prime last month. Will have to check.