Man, it sure does look a lot like the Nexus 4. I wonder if LG is the OEM and if they retained the design rights for future products.
The phone also has a whopping five front-facing cameras, possibly related to previously rumored features such as head tracking for 3D effects and gesture controls. Sounds like it won't cost much and Amazon will get a reduced data plan from AT&T so you can watch their Amazon Prime Videos. Lot's of good rumors here in this link,
Amazon phone release date, news and rumors