IMHO the main point is not that US Navy will procure what India gives. They'll have more feasible hardware.
For us it is an advertisement that we have a high-tech product that is worthy of being offered to the world's foremost economic, technological and military superpower even though what we are offering is something that the US can design with ease.
It is a demonstration of the intent of closer military cooperation between US and India. Also, it is a good pitch to tell the world that we have a high-end military product that we are confident about.