Amazon (AMZN) on Thursday sent invitations to the media for a press conference on September 6th in Santa Monica, California. While the topic of discussion was not revealed in the company’s invitations, it is widely believed that Amazon will finally unveil its next-generation Kindle Fire tablets. BGR exclusively reported in June that Amazon was prepping two new tablets, an updated 7-inch slate to replace the current Kindle Fire and a brand new 10-inch tablet that Amazon he been working on for more than a year.