The printing press and TV did ruin the societies that preceded them. The new societies they produced were better (in the case of the printing press) or arguably better (in the case of TV) - by some subjective metric of goodness.
But there's no guarantee that the past will be like the future, or that all technological developments create better societies, or that it's always better in all ways. The development of the personal automobile improved many things but also created many catastrophes - environmental destruction, automobile fatalities, leaded gasoline, urban "renewal" and sprawl - that we're still grappling with. If we come out on the other side then yay, but even then we're talking about 150 years of some serious growing pains. Maybe the internet looks the same way.
