The gadget show: the defining characteristic of tech in 2019

In 12 months, a lot can happen— just ask any politician. And the tech industry is no different: a vortex of relentless creativity, much of which is burning out before it begins.

So what's going to stay here and what's going to disappear in 2020?

From sleek, must-have innovations to high-profile flops— and how the industry's attention has started to shift — this is a snapshot of the technology t....