Last week, Midwest digital shop VML was merged with old-school legacy agency Y&R, one of the first moves under WPP's new CEO, Mark Read. It's part of a larger plan to create a slimmer, less siloed holding company that's better suited to face the challenges of the industry. The global CEO of now named VMLY&R, Jon Cook, says a consolidation in the industry was long overdue -- and this is just the beginning.