At a glance, it seems way more useful 'offensively'. Most systems are installed inside a home, and track entry and exit. That works great if you own the home a

At a glance, it seems way more useful 'offensively'. Most systems are installed inside a home, and track entry and exit. That works great if you own the home and start from an empty state (so everything is fine unless someone enters). But if you don't control the building, or don't know who's inside to start out, then most existing systems fail. Which means Aura seems like a breakthrough specifically for surveilling locations you don't have full ownership of, like someone else's house or a neighboring apartment. Which is a bit disconcerting.