The Grocery Delivery Business Model

$WMT is getting into the grocery delivery business. Does this make any sense whatsoever?

I remember back in the 1990's when some of the grocery chains tried the grocery delivery business. It didn't last long. Has anything changed to make it successful for Wal-mart? It works for books and bike parts, but groceries?

I want to thump on the watermelon myself. I want the bananas that aren't overripe, but have enough green on them to last a few days on the counter. When I pick the loaf of bread, I look at the expiration date and try to get the newest bread.

You know what I mean?