If it’s about speculations then maybe Amazon wants to avoid a lockdown situation with apple or any other company. What if tomorrow apple decides to ban kindle app? Or google decides to start policing the android market and wants to squeeze more juice than they are already getting with their adds?
Wouldn’t it make much more sense for Amazon to have their own device that they can integrate it with their ecosystem and remove the dependency on anyone else? And its not that they are going to pull back the apps from other devices but their own device will be better integrated with Amazon ecosystem.
Just speculations..
din