You should add a cookie banner for EU users as you track users with google analytics without any consent. Also you should make it clear that the amazon results are ads and you earn money with your company with them.
Thank you. Otherwise great idea to have some horizontal view on different topics :) The idea behind that can probably also be applied to internal search results where you need to gain quick insights into multiple topics related to one keyword.
Yes the UX could be used for other search apps. Internal search is a good one, maybe searching a bunch different doc types or internal databases. Good point!