I think you're confusing Uber with...umm Uber. This is exactly why Uber is evaluated at $17bil (or whatever number they're saying today) because it's ability to handle the software logistics of delivery...any delivery, regardless of whether it's a package, person or food.
It's also why we're seeing a plethora of restaurant delivery start-ups (Door Dash, Sprig, etc come to mind) as VCs race to capture the market.
I'd normally dismiss talk like this, but given who said it, I'll give them the benefit of the doubt.
Can anyone shed some light on how Instacart has become just as "iconic" as companies like Facebook, Twitter, Google or Microsoft?