The marketing part is potentially quite challenging. As well as finding a niche market that is underserved.

patio11 is famous because what he did was really non-trivial even though he is such a humble person he discusses his work in very homely terms.

Right, didn't intend to understate the achievement. Mostly emphasizing that the product idea does not have to be complicated or original. Success is overwhelmingly about it filling a need for the target market, execution, and professionalism.