Doubts are unavoidable. I'm in the same boat at the moment. People don't understand new ideas in general, only once it becomes mainstream. I think what's import

Doubts are unavoidable. I'm in the same boat at the moment. People don't understand new ideas in general, only once it becomes mainstream. I think what's important is to go talk to people that would be potential customers and listen to them. Listen to what their doubts are, and build your solution to answer these doubts. If they think they would not use your solution, ask them why. They will tell you a reason, ask why this reason matters to them. etc. By doing that enough times to enough people, you will get a feel of why there is resistance to your vision, at which point you can either adapt your vision or go do something else.