Grocery product managers are starting to face a real problem. 

More and more of their business is starting to be driven by customers going online and ordering food and then expecting it to show up at their door.  What this means for these product managers is that the old way of doing  business, building more grocery stores, is no longer going to work in  the future. 

Product managers are going to have to change their product  development definition and find ways to keep up with the changing times.