Ad Age has the details about the Forrester prediction that U.S. advertisers will spend more of their funds on digital than they will on television by 2016. And by 2019 an estimated $103 billion will be spent on digital, representing 36 percent of all ad spending while TV will see $85.8 billion or 30 percent. Search will be the big winner, according to Ad Age, because advertisers are able to measure its benefits most directly. Display advertising, which includes digital video ads, will follow close behind. Social spending on Facebook's and Twitter's in-stream ads will grow more than any other digital channel over the next five years.