Wall Street Journal: As television networks enter the frenzied ad-sales period known as the “upfronts,” they would seem to have a dismal story to tell. Cord-cutting is rising, ratings are sinking and ad-free streaming services such as Netflix are on the rise. And yet, the networks are poised for a surprisingly strong showing. Some advertisers who have made big bets on digital are coming back to TV because the return on their investment didn’t live up to expectations.