Your interface is just a fantasy. You haven't taken any steps towards making it a reality. There's no demonstrable prototype. There's no documented research into it's principles that you have uniquely contributed directly to.
That's the difference. You haven't undergone any inventive steps, because you haven't created anything. You have a vague idea that such a thing may be possible, but haven't undergone the rigor of understanding and implementing a basic example of what you have conceptualized.
This isn't to be confused with comercializing the idea, figuring out how to market and produce it to meet demand, package it, and deliver it. That's a wholly different process, parts of which itself may require further inventions.
