Bloomberg/Getty Images Wall Street is getting ready for Amazon earnings after the closing bell. The key metric for investors will be revenue in the AWS segment, as Amazon has been pouring money into its cloud and AI capabilities in recent quarters. Also key to this quarter's results will be any news of Amazon's chip developments. CEO Andy Jassy is hugely bullish on the initiative, so much so that he took a rare shot at Nvidia when talking about the project in his letter to shareholders earli...