I would love a Bluetooth or usb TouchID only accessory. I mainly use my work laptop with an external monitor and keyboard, but I have to keep the laptop open to quickly access my password vault.
Same, I have the keyboard sitting on a nearby shelf to my iMac for the TouchID feature. For anyone that uses some kind of keyboard a standalone TouchID device would be a godsend. :/
You can set this up with some hardware tokens. I've done it in the past with a Yubikey.
1Password allows unlocking with touch id, but not hardware keys like yubikey.