There is no such thing as being "too early" to market. That is how you cut your teeth, learn and get ahead. You fail when you give up on the idea (or are proven that it will never catch on... either way). However if you create a product that eventually takes off, and if you continue to iterate it and not abandon it, you can't be too early. And, if nothing else, it is 100x less risky to be too early, than too late.