Delivery by self driving car makes more sense to me. Both are automated but a car avoids weight, landing and FAA issues. Not to mention that our homes are already configured for easy access to roadways.
You could have a postbox-like port that it could put items into.
We have grocery delivery in my area, but it's such a hassle because I have to be home within their time window and I have to book it a couple days in advance. Why can't I just hit a "now" button and it arrives via drone, at 2am if I so desire, when most delivery people are sleeping? Or in a rainstorm, because the drone doesn't care?
Our building doesn't have a helicopter landing pad or anything that fancy, but it's fairly clear and well-maintained (no debris or trees growing up there). There's no reason a relatively light drone can't land without issues.