I would consider the rise in TV news to be troubling, especially considering that more than three-fourths of Americans say that's a primary news source. Internet news influence may be growing, but it'll be a looooooooooong time before it ever reaches that kind of influence, if ever.
The real story here is the continued growth and dominance of TV.
The growth that you see is almost certainly Fox News.
What they failed to note was the big increase in market share for Fox News. That probably was where the increase in tv % came from.