At present, not many vac robots have cameras. Most of them have lidar based mapping. So perhaps knowing about house size is possible, but difficult to gauge if

At present, not many vac robots have cameras. Most of them have lidar based mapping. So perhaps knowing about house size is possible, but difficult to gauge if a house has toys. However, two issues are important here. 1. House sizes are already openly available data, from addresses and satellite data. Heck, even tax filing data, gathered from credit card linked sources is enough to gauge a households income. 2. Future robots may include cameras, for "smart cleaning", but AMZN will definitely keep an inventory of items per household and will sell them stuff. I could imagine AMZN releasing an app to show a product to the vac and the vac will order it for you.