Remember when people scoffed at the idea of getting into cars with strangers, but then ridesharing apps like Uber and Lyft became juggernaut businesses? Remember when the idea of staying at the home of a stranger you met online used to be weird, but then Airbnb brought hundreds of millions of people into each other’s homes?

The same softening of attitudes, this time about letting people into your home, is what Amazon and Assa Abloy, the world’s biggest manufacturer of locks, are counting on.

Smart locks can be used to let Airbnb guests inside your property, allow deliveries to be placed inside your home, and grant access to professional services like a plumber or carpenter to finish a job when you’re away from home. And if anonymous sources are to be believed, Amazon’s been considering the sale of more large items like furniture or home appliances.

Wouldn’t you be more inclined to buy a refrigerator or couch from Amazon if someone could bring it inside on your behalf? Your smart camera with a speaker inside will send a notification when the delivery crew enters your home and will record the whole thing.

Can’t hurt these ambitions that a survey out this week found that voice shopping will grow to $40 billion in the United States by 2022, and that Amazon appears to be the one with the most to gain.

And, yes, as always, Ring gives Amazon a chance to put Alexa someplace new. It’s no secret Amazon wants to spread its AI assistant everywhere, and it seems likely that will include the Santa Monica-based startup’s connected security cameras, doorbells, and other products. Amazon’s Cloud Cam, which comes prepackaged with a smart lock, does not yet answer to Alexa, but as of a little over a week ago Nest Cam IQ Indoor from Google can speak with Google Assistant.

The smart speaker was a beginning. Through the Alexa Voice Service, Alexa can now be found in a variety of appliances, from light switches to lamps, and all matter of appliances and devices in between.

Amazon even filed a patent for a mirror that uses augmented reality to put you in different clothes and locales. A patent does not mean Amazon will bring such a product to market soon, if ever, but if it ends up being anything like Echo Look’s computer vision for fashion or Kohler’s mirror with Alexa inside, it could assist the ecommerce giant further its Prime Wardrobe initiative to sell you more clothes.

Amazon has a sizable lead over its competitors in the number of smart home devices it can control, but the Ring acquisition wasn’t just about extending Alexa’s smart home dominance. It’s about the extension of services from both humans and machines even deeper into your home. All you have to do is let Amazon in the door.