Fresh food!
John Foraker, Once Upon a Farm: I am really looking hard at continued expansion of fresh across all retail and online formats, and its impact on so many traditional center store categories. I think grocery stores are going to look far different five years from now, and that demand for fresh & healthy will drive that.
Another thing I am watching closely is the exploding trend in grocery ecommerce with adoption of 'click and pick' where consumers order online and their groceries are delivered to the door of their car when they drive up. This has huge consumer benefits and as a business model for retail it can be very powerful as well. It is expanding geometrically right now across retail.