It's disappointing that they went for 16:9 in this product, especially considering it likely needed entirely new production tooling. They could have chosen 16:10 or any other forward-minded aspect ratio.
This factor is more important for the emerging e-ink desktop monitors than for these alternative purpose products. However, it is important to establish productive standards early, especially if they become shared across multiple target use cases.
Samsung is now selling a big color display based on the e-ink technology. It's designed to be easily readable even in direct sunlight, offers long battery life and therefore doesn't have to be plugged into a power outlet all the time.