Auto-payment stuff has been tried before in some places, but it's largely a failure. It's too prone to generate false positives in both directions (not detectin

Auto-payment stuff has been tried before in some places, but it's largely a failure. It's too prone to generate false positives in both directions (not detecting purchased goods and the usual rigmarole of failing to properly identify a customer because facial recognition tech isn't that good). Self-checkout seems to be the happy middle ground where the lost turnover/angry number of customers is reasonable enough for it to be possible. People really don't like "computer says no" when their money is involved and that's the barrier you need to clear before auto-checkout is a thing.