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This is really cool, but I still feel betrayed cause when I read "touchless" and "contactless" I thought this was gonna use NFC

Which NFC? Almost no laptop has nfc reader. I am not sure if the situation is different with PCs.

Personally, I only know Dell Precision 7740 to have built-in NFC. I guess tablet-like / 2-in-1 laptops might also have it.

Edit: Lenovo Yoga, Lenovo X1 Carbon have NFC too.

Edit 2: Dell Precision 7750 also offers it.

Edit 3: Models with pre-installed NFC module are very scarce, this site [0] lists only 204 occurrences among 7136.

It’s not NFC, but macOS uses Bluetooth for Apple Watch unlocking.

Sadly, it’s slow and unreliable.