Loss prevention using this tech is tough, especially since it's trivial to defeat UHF RFID tags' detectability -- on purpose or by accident, by placing the tags

Loss prevention using this tech is tough, especially since it's trivial to defeat UHF RFID tags' detectability -- on purpose or by accident, by placing the tags against your body (fundamentally different from EAS). Plus, the things you're most-keen to track (high-value items) are also the most likely to contain metal; metal mucks w/ RF propagation and energy harvesting, and therefore requires special (more-expensive) tags. This idea dates back to the early days of UHF RFID... it didn't work back then, and not much has changed in the technical fundamentals that would make me think it has suddenly become possible. There are some new uses cases in retail... but they revolve around new (non-checkout) business plans. I would LOVE nothing more than to be proven wrong... so I hope they find a way to make it work! (I happen to be an expert in this field... happy to talk more, as it's still a major interest area.)