The title is overly pessimistic. We may have wanted flying cars, but the mobile internet is far more empowering/revolutionary than moving cars to the air.
The problem the article highlights will self-correct. Twitter is a good additional news source because it is unfiltered and because of the multiplicity of sources, although we need to adapt to taking news in this form. I wouldn't buy or sell stock, or do anything drastic based on one source. Logic dictates that if the White House were bombed, lots of people on the ground in Washington DC should also be tweeting about it. As we become more savvy, Twitter's influence (the problem according to the OP) will actually be more of an asset. It probably already is.