When I see titles like that (despite the fact that it was intended as sarcasm), I think to myself, e.g., "I bet at least hundreds of people who scrolled past it thought it was sincere, and now they will have this subconscious 'Heroku is Dead... Docker...' thought at times when deploying projects. Maybe they'll even check out Docker. Maybe these hundreds of people will represent a tipping point of sorts for Heroku->Docker migrations, because one of them will write a really great blog post about it, and it will receive thousands of views..." (alternate endings of the same thought continue to be brute-forced for a few moments).
Along the same vein of thinking, back in 2008 I had this "realization" that Google could control the world by simply showing results based on headline titles (e.g., a search for "Obama" during the election could have resulted in articles / results whose titles have words/phrases whose presences are positively correlated to lower or higher stress levels, assumptions, other emotions, etc., resulting in a net positive or negative sentiment, respectively, about the subject of the search query, all while simply scanning the results to determine which one to click).