80% of adults on Earth will have smartphones by 2020 Planet of the phones www.economist.com fastest-selling Economist by 2020, this number will rise to 80% fastest-selling Phono Sapien phono-sapiens fastest-selling 80% of smartphone users fastest-selling Phono-Sapiens nearly everyone has in their pocket Economist-Planet of the phones 2020 that number could be up to 80 percent 2020年には世界人口の8割（約50億人）がスマートフォンを保有するとの予測 four to one second Planet of the Phones The Economist reports Phono-Sapiens Planet of the phones 80% of smartphone users this recent one the February 28th edition 10 mobile phones phono-sapiens fastest-selling pace of our high-tech evolution 10 mobile phones