>You'd buy tabloids for the celebrity news; you'd watch the nightly news on cable; you'd flirt in bars; you'd travel to visit friends, or have long, nightly telephone calls with them; and you'd keep up with the real Joneses next-door instead of keeping up with the virtual Joneses on Facebook. And you'd be a workaholic by always being at the office, rather than by being home but inattentive.

all those have significant higher friction and time/effort required than smartphone based equivalent. Instant gratification is extremely important factor in the enforcement of addiction. It is like gambling addiction by playing weekly state lottery vs. playing slot machine or roulette in casino.