Support for OpenPGP on security key

Security is a rising concern, and a lot of security solutions are being presented. Physical security keys are emerging, and Google now sells their “Titan” key in the US, based on the positive experiences they had using Yubico’s YubiKey.
Accessing a security key to read an OpenPGP certificate into EmClient, must be/could be an standardized operation, as the OpenPGP software supports security keys such as YubiKey.
The software required to read from security keys, are available in public domain, and supported from several vendors.
A plug-in function or check field under PGP support for security keys (and a test function) would be very nice.