Thats fantastic, but how does this work with purchases made on the Play store. If I bought an app on the Play Store does it carry across to Amazon ?
I figure the reason Amazon and Microsoft a ganging up in this way is precisely to address this issue: They want vendors to support a more portable mechanism for purchases that isn't tied to the Google silo.
edit: the more i think about it the more it makes sense – multiple hardware vendors of the handsets themselves, then multiple software vendors of the the apps themselves. Would surely spur competitiveness and innovation when it comes to app pricing/bundling/sales/…