Bob Bauer writes:
Yesterday I discovered that the concept 'person who is continuously looking at or obsessively interacting with his/her smartphone or other type of electronic handheld device' has been lexicalized in Cantonese as 低頭族 dai1 tau4 zuk6 (literally, 'head-down tribe') (according to an article by Mark Sharp in the South China Morning Post).
[VHM: See "Beware the smartphone zombies blindly wandering around Hong Kong" (3/2/15)]
Have you heard of this word? It may have originated in Taiwan Mandarin.
"低頭族" 853,000 Ghits (on March 4, 2015)