Apparently all the manufacturers of nuclear technologies and plans are non-thorium based - they have interest in their promoting their business. Thorium based reactors are definitely the future - India has been active in this area since a very very long time and has reportedly made quite a substantial inroads into its use and application. It is mainly motivated by the fact that it has to rely on the nuclear raw material from those few who would not sell it easily - a lot of diplomatic and political arm-twisting, conditions and business favors.
The real reason US and other western nuclear powers want India to sign NTPT and CTBT by offering it nuclear fuel (for non-thorium based reactors) is also to make it agree to sign for access to its nuclear facility for overseeing its usage and security by the "watchdog" agencies and also to roll back and terminate its research reactors (which are instrumental in thorium research), and thereby either kill its research and/or gain access to it.