Reverse Innovation

I read in a recent interview of Mr.Vijay Govindrajan, noted management author, about this concept which he has elaborated in his new book, "The Rules for Strategic Innovators" and an article in HBR, "How GE is Disrupting Itself." I would like my fellow members who are aware about this to enlighten us. GE has implemented this long time back and I understand that Tata Motors with its Nano model has also done it