I highly doubt they would, however as soon as their store gains traction, it makes very little sense for Amazon to support a direct competitor on their own branded devices.
I'm not saying its a good or bad thing; it's just how these vendors operate. You don't have itunes on android devices, and you don't have the google play app available on i-devices. You can still use the Play web app on any device, of course.
Exactly. So perhaps Amazon might begin to block it in the future. I don't really see that happening soon, however. Amazon hasn't built up enough critical mass to ditch the larger Android ecosystem.
With Amazon starting up with their own store, this may soon be a thing of the past.