It looks like it will be on prem, but then i dont even understand why they would involve amazon at all? Just use the existing public solutions. As soon as any major part of a system that is connected to the internet has proprietary code in it, you cant really trust it to protect secret information anymore.
Cool video i saw a few days ago about the challenges of making true microLED displays. These would become the unchallenged king of displays if it became economical to make them and wouldnt have any of these issues.
https://www.youtube.com/watch?v=8_2KcB8JkfE