Amazon Enters the Ring with Luna, its Game Streaming Service

Interesting that Amazon would jump into this arena. I did sign up for early access but I see that their partner, Ubisoft is only listed as "Coming Soon". Playing games on iOS through the Safari browser is a neat trick but I wonder how long before Apple addresses this and limits it or shuts it down through a policy change. Clearly, Amazon thought this through.
Big concern is the library of games that will be available, and I don't mean quantity but quality. The big AAA titles from Sony and Microsoft are not likely to be appearing on Luna anytime soon.