On: TOTP tokens on my wrist with the smartest dumb watch

[lukeschlather]

You need a TPM 2.0 compatible CPU, but something like this sounds really excellent: https://github.com/tpm2-software/tpm2-totp

This means your laptop itself would be your hardware device, the TOTP secret would be stored in the TPM and theoretically impossible to steal/copy. Of course this means you will probably want a mobile device (possibly a second laptop also) as a backup.)

[cryptonector → lukeschlather]

Note that tpm2-totp is specifically meant to authenticate your laptop's state (TPM PCR values) to you, not you to some third system. But you could adapt tpm2-totp for the purpose of authenticating you to other systems.