Smart speakers set to overtake tablets by 2021
Global speaker sales are predicted to grow 82.4% in 2019
Smart Speaker installs expected to hit 100 million this year, but HomePods make up just 4% of market
It's one area where Amazon and Google dominate
Canalys: iPhone X was world's best-shipping smartphone over the holidays, but still fell below expectations
29 million units were reportedly shipped in Q4
