>There is plenty of money to be made selling home layouts to police.
The police basically already have this in the form of building records. Unless you live in a really old building or you've made unapproved modifications, they've got an accurate layout if they care to look.
There's nuance, though. You're right in that they can get a general layout of the rooms in the home, but a mapped layout from a device like this gives them a lot more detailed information - where large objects are that potential targets could hide behind, or stash things.
One data point offers a drawing of where the walls are, another paints a picture of where everything the occupant owns is sitting.