On the page it says:
> What kind of things will I deliver? You’ll deliver ultra-fast Amazon Prime Now packages.
If you're ordering something for ultra-fast same-day delivery, surely you know precisely where you want it delivered to at the time of ordering?
[1] I'm aware of Amazon Locker, but I don't live in Seattle, the Bay Area, or Manhattan; and dealing with yet another pickup point for a specific merchant just seems like an annoying hassle.