Timing is everything. IMO, this is the perfect timing to start a mission such as the one Mr. Gates is. Why? Well having just been to India last year, my cousins were complaining about how India is filled with geniuses, yet very few who want to take risks (whether it be to help fix the poverty, the political system, or just start cool companies). A couple months after I got back from India (I live in the States), I was talking to my cousins and they were telling me how some cities in the south are really starting to embrace a tech culture and were trying to resemble that of Silicon Valley. And it's grown magnitudes since then; in fact, in recent months, there have been a lot of posts on HN about India's tech expansion.
So Mr. Gates says it well: "To make real progress on the problems of the poorest, you need at least two ingredients: a deep understanding of the problems, and the technical ability to solve them." He probably is going there to better understand some of the problems that exist, but I bet he also understands there are a lot more people there that can help solve these problems. He's a pretty smart guy, I trust he'll actually do good on his visit and it will be constructive to India and its people.