Unlimited supply of power? Untrue. The most optimistic guess is just 10% of our needs.
The US may need India today, but history tells us that the US govt is very untrustworthy. All these years the US supported the Pakis knowing fully well the Pakis are training and funding terrorists against India.
India can still be bullied and it is still being bullied. The US wants to encircle China by using India and Pak and Afghanistan. I don't know if it such a good idea to play these games.