Amazon's barrage of new gadgets shows why it's the most dangerous and relentless company in tech (AMZN)

In the span of about an hour on Wednesday morning Amazon went on a hardware rampage,unleashingfour new Alexa-powered smart gadgetsanda handful of newaccessories. It's a sign of Amazon's relentless pace: Already this year, it launched the Echo Look (a voice-controlled camera) and the Echo Show (a voice-controlled tablet/video phone), both of which constituted major new product categories. Theobvious question among the shellshocked observers of Amazon's product barrage: Will it work? Will anybody ...