Imagine a weapon that can only be fired by the person who paid the taxes to own it and rigorous background and constant follow up checks to continue to own it. If the ballistics of a crime come back matching the pre-registered pattern of your gun, No one but you could have committed the crime . All non-smart guns will be collected and destroyed. Maybe they can even install a web enabled link that can render your or all guns inert.......
Your President thinks the technology already exists.
Here's an interesting article pointing out the absurdity of the concept...
https://www.nssf.org/smart-guns-dumb-policy/?utm_campaign=coschedule&utm_source=linkedin_company&utm_medium=National%20Shooting%20Sports%20Foundation%20%7C%20NSSF&utm_content=Smart%20Guns%3F%20Dumb%20Policy%2E