The title is wrong. I understand how the development community has gotten hung up on the absurd GUIs and CLIs we've had to use but that's not what the word interface means.

    Interface: A point where two systems, subjects, organizations, etc., meet and interact.

A door handle is an interface, a burglar alarm is an interface, etc. The term you're actually looking for is "invisible interface" instead of in-your-way interfaces. But if you wish to have the ability to interact with a system, you cannot remove its interface...