The original licensing was based on concurrent connections. The new license is based on concurrent user. Previously, if a user were to connect on his laptop and his smartphone and some other device, it would consume three licenses. In today's model, it would consume only a single license. The new licensing model also allows you to share the licenses across all firewalls in your organization rather than being bound to a single serial number. As far as I know there is no explicit mapping needed.
Hope this helps.
