Consider groceries. I can't get two weeks of groceries for two people without a car. Wine bottles get heavy, and stacking bags on my arms risks crushing my eggs. I imagine it's even more complicated for those with larger families.
It's also generally cheaper to pick up furniture with Zipcar than it is to have furniture delivered by retailers.
I know there are some grocery delivery services cropping up, like Instacart, but they're concentrated in very urban areas. I remember using a grocery delivery service in the early 2000s, and it was a disaster: eggs were broken, liquids were spilled, boxes were crushed, etc. We need to see a lot of improvement in this space.