I too completely disagree with Kate in regards to the relationship of the number of internet users and domain name value. Although the correlation may not be direct, they DO have a strong relationship with each other and it would be absolutely absurd not to think in that manner. As the number of internet users increases, the value and worth of owning a keyword domain name also becomes more appealing to businesses or to those whom wish to have a presence on the web and direct their business towards web users in that particular country.
Ok, other factors do play a part in all of this, which includes the overall data value of each user and what they use the web for. At the moment, many young indians are using it primarily for social networking but this IS CHANGING massively and at a very rapid rate. More and more indians are now moving past the social networking stage and also increasingly using e-commerce on a daily basis, as well as other services such as for entertainment & education. The government is backing the .IN extension and useage of the web in an enormous marketing push.
India is unlike any other market in the world, it is leapfrogging older technologies, moving straight onto 4G, it has started with social networking useage and then moving onto other areas of use, which is actually the opposite of what has happened in more mature markets such as in the west BUT India's rise is happening at a much faster and rapid rate, yes it is an extremely young market but one which is growing faster than any other in the world right now. I think everyone should watch .IN extremely closely, as I think it will easily outperform any other extension for ROI.