Fresh new Amazon Tap update might make the Echo obsolete

The Amazon Echo is a $180 speaker that serves as a portal into the wonderful world of Amazon's virtual personal assistant, Alexa. The Amazon Tapis a $130 speaker that serves as a portal into the wonderful world of Amazon's virtual personal assistant, Alexa. Apart from their designs, there have always been three maindifferences between these two great speakers. First, the Echo is $50 more expensive than the Tap. Second, the Echo needs to be plugged into the wall at all times in order to work. And...