This is a great move for Amazon, but I don't really understand the benefit to renters or landlords.
"Luxury" apartments in NYC used to have ipod/iphone docks in the wall the connected to the speaker system. Every single agent talked about this great feature, but it just looked awful. Besides the fact that I'm an Android user, the connector was pre lightning so at some point I'm sure the landlord has to upgrade everyone's wall dock. A feature that only some can use, and fewer will use. Only so they can seem extra fancy to a select crowd.
The point of that antidote is that this Amazon "feature" will likely only be in "luxury" buildings as well. Most landlords don't even allow their rent to be paid online. I doubt they will get "alexa pay my rent" to work reliably.
About half the people I know will not stand have any home spy devices in their home on principal alone, and the other half already have one. Putting this in you're building seems like a way to make half your renter base dismiss you, and redundant for the other half.