As I get older I appreciate the convenience of shopping online; for example, I get a lot of my fabric online and am seldom disappointed. I'm at the age where most of my in-person shopping is groceries and paper goods and then it's home again, home again, jiggedy jig. I enjoy the occasional garage sale, thrift store, flea market -- but the prices at all those are going ever higher, so I view it mainly as entertainment with an occasional "find".
It's a fact that we'll lose some brick-and-mortars in the future, especially those where people can see and touch an item and then hit the internet to find the same item for less. On the up side, I think we're entering an age where people will better appreciate well-made, handcrafted, one-of-a-kind items. I'm personally hitting the stage where I prefer one quality item over a dozen throwaways.
You're right; our shopping habits will change. And now with the advent of 3-D printers and drones... don't even get me started!