Basically the ability to update and manage configurations in the local host file from the web interface. The use case would make it easier to setup and maintain split DNS and other related issues, such as redirecting public addresses to local IPs to automate and minimize going out to your public IP and coming back in (which many ISPs don't allow).
Also multiple Local DNS records to a single IP address. The Host file is simple, even just the ability to free text edit would be fine, would just be nice to securely update via the web management.