I’m sure the usual fearmongering arguments will be used to promote the technology. But I have to ask: what’s the upside of this tech? It needs to scan everyone’

I’m sure the usual fearmongering arguments will be used to promote the technology. But I have to ask: what’s the upside of this tech? It needs to scan everyone’s face at all times to get a match. What are the applications and what’s the upside? How does it compare with a CCTV system like in London or Singapore? I’d like to understand the trade off.