On a daily basis we are always giving and receiving business cards on a daily basis. There are also many apps already that allow you to even scan your business cards and add them to services such as LinkedIn. About.me a San Francisco based start-up, introduced a new app for the iPhone called Intro for the people who may have forgotten there business cards or do not have one at all. Intro allows you to create a profile page you can share with anyone in case you do not have your business cards with you.
To learn more about this, please see the following article written by Karissa Bell with Mashable: http://mashable.com/2014/10/30/about-me-intro-app/