Here's an interesting article about how technological advances are trying to make grocery shopping easier or more appealing.
I've made use of a number of services where you order online and they deliver the goods to your home. For me, at least, they can't fully replace driving to a Ralphs and pushing the cart around. For one thing, they never have wide-enough selection. I just got a free test-drive of Amazon Fresh and when I went to their site to try a test order, I gave up. There were about fifteen items I wanted and they only had three. Why bother if I'm going to have to go to the market anyway? Years ago when I tried the home delivery service offered locally by the Albertson's Market chain, they'd deliver my order and then I'd go get in my car and drive to another market to procure the stuff they'd been out of.
There were briefly two different services in my area — HomeGrocer and WebVan — that worked well until they went outta business. But even then, I missed something. I missed being able to browse the aisles, notice new products, inspect their packaging and maybe decide to take the gamble of tossing one into my cart. As I look at the list of things I routinely buy, I see a number of products I discovered that way.
Someone will get this kind of service working well and successfully but I think I'll still be Ralphsing it two or three times a month.