Two tech giants grabbed headlines this week with big product news. Amazon.com (NASDAQ: AMZN) announced a huge new lineup of hardware, including a whopping 14 new devices. Then, on Friday, Apple (NASDAQ: AAPL) started delivering its new iPhone XS, iPhone XS Max, and Apple Watch Series 4 to notable crowds around the world.Here's a look at each of these stories -- and why they matter to investors.Echo Auto.