That "study" in that article is hilarious. The author observed people in Airports, Subways, Cafes etc. and whenever someone was using a Smartphone, he took notes (so it is more of an observation that a study). This is biased in so many ways.He went to places where people usually have to kill time, and do so with their smartphone. He didn't observe all those people that had a smartphone in their pocket passing by, going for their day. I don't use my smartphone to kill time, and I restrict myself from using it when not necessary. Yes, it is a tool, I need it to check the bus schedule, buy a ticket etc. And thats it, and thats why I would be totally fine with a 5" display.