In this extended article about the sale of Instagram to Facebook, the author describes Instagram's early shift in product design that ultimately led to its popularity thusly:
It was the sort of eureka moment that made perfect sense because the solution had been there all along.
We often assume eureka moments will happen when something or someone new shows up. But often, these moments occur when we finally see rightly what has been in front of us or correctly put together something wonderful from the ingredients we already have.
There's a cake in my pantry. Well, it's not a cake yet - but the ingredients are all there. The actualization of the cake can't happen, though, unless I show up and bake.
Don't lament what hasn't yet arrived. Spend your energy piecing together what you already have and watch as something delicious takes shape.