It's exciting to see the WooCommerce Store API become stable.
It won't allow unprecedented e-commerce user experiences because those who genuinely invested in WooCommerce built their bespoke API to create unique shops. Nevertheless, I believe this will open the doors for some products and services for the general public that was impossible without an official API having checkout and cart.
While reading the article, I already had some ideas about using this. Surely others too! I'll closely follow this topic.