For people with enough space, I was thinking that a secure box outside our home would be a good idea to receive deliveries. Something like the coal bunker of days gone by. With some sort of standard on the e-lock that can be opened by a variety of retailers who you specifically grant access. Yes, there are obvious implementation problems, but i'd rather have my shopping left here than give someone access to my house or car.
The box could even be insulated or refrigerated for receiving deliveries of groceries.