We often get lost in the details of what we're working on. We concentrate so much on this particular thing and then that particular thing. Before we know it, we're forgetting the bigger picture; we're ignoring the stuff that really matters.
So take a step back. Forget about the details for some time. Do something else, something completely unrelated. Go to people completely ignorant about what you're working on and ask them questions. Listen to them and remember: you've become used to this thing. To you it's the most natural thing in the world and most people understand it. To you it's important, imminently popular and... right.
You might be in for a surprise... and that's a good thing! Zoom out and refresh the overall impression.