On the Tesco blog (who knew there was such a thing!), they're talking about having 3D printing as an in-store service (in addition to the paper print services some larger stores have). The idea is that you could go in and say "I bought an XYZ brand microwave, but the handle's broken off" and they'd print you a new one while you get your shopping done. They're even talking about digitally repairing 3D-scanned things you take into the store too.
For us in-the-know about 3D printers, we've been expecting this for years. Even Tesco are a way away from actually doing it, but it's great to see that it's something that really might happen sometime soon.