Rather than smart design, I think I would personally call it human-comfort design.
It is not like I am saying that being more comfort to use as human is not a smart idea, it is just that I personally have a sterotype of smart devices like phones/computers, thinking that the term smartshould be drawn more towards the artificial intelligence side.
By all means, smart designs are aiming towards the comfortness of the users. It comes as a surprise to me that even the handles on the tools have that many details, it is just something that I would neglect on my day to day lives.
However, it were those small details that fit into everyone’s lives. The chair that bent to a degree that is most comfortable to the users’ backs, mouses that most users hold smoothly, even the wsad keys that people now use to play games, these smart designs that fits human body mechanics flooded invisibly in our daily lives nowadays.
The two examples that I can think of is the shoe sole and memory foam pillow.
Some shoes are having their soles designed to be quite bouncy, and that is to aim for clients who work heavily and physically. The bounciness of the shoes will imperceptibly lower the amount of force needed to lift one’s foot. On an average of 20000 steps/day workers, the differences becomes huge on the fatigueness of their leg muscles.
Memory foam pillow, or memory foam itself, are a bless to the human body. The foam has the flexbility to adjust the pillow shape to the most confortable position, which makes a lot of adjustions that originally should be done by human unnecessary anymore.