They have promised they will release new voice packs and styles,but so far no word about Indian voice packs.Here,is the reply i recieved from Yamaha:

Dear Sunny,

Thanks for your suggestion sent to us on 28 & 29 Jan.
Actually, we've realized that there are huge demand for localized instruments and styles including India. At the moment, we can not say which type of packs will be going. We would consider Indian voice and style one of voice pack planning.
Please keep your interest for Tyros3 and voice packs.

Best regards,

TyrosYamaha