"Next Billion" is a term you will find used in talking about the future of the internet. It refers to not only the exponential growth in connectivity in emerging markets, such as India, but also the growth of next-level technology in more mature markets.
One thing that is evident is that the next billion internet users are much more likely to be using mobile phones than a computer. Globally, half of all internet users got online in February 2017 using mobile devices. It is still a close race with 45% accessing the web on laptops or desktop computers, but break out the number for emerging markets, like India, and the mobile wins easily. In India and other countries that did not have wired infrastructure in place for Net connectivity, and did not have a population able to purchase computers, mobile and wireless are the only choice. Indians accessed the internet through their mobiles nearly 80% of the time.
This is also changing the way providers, carriers, phone manufacturers and related companies (such as Google/Alphabet) design.
For example, the emerging next billion tends not to type searches, emails, or even text messages. These newcomers avoid text and use voice activation and communicating with images. Part of this is due to their unfamiliarity with the devices, and partly it is due to a less educated and literate population. They are using low-end smartphones (Android dominates) and cheap data plans along with the most intuitive apps that let them navigate easily.
What does this have to do with education?
My first thought is that even if your students are part of the "first billion" population, delivery of learning online needs to very seriously address mobile use, and the user interfaces need to be intuitive and less text-based.
My second thought is that educational providers, especially post-secondary, need to be prepared for the next billion learners who will not be coming to them in the same ways, or with the same goals, or with the same devices. When I say "educational providers," I am thinking of much more than schools and universities.
No doubt some of this has already been taking place through online learning and especially with the rise of Massive Open Online Courses (MOOC) and Open Educational Resources (OER), but the pathways are not even well established for the first billion, and certainly not for the next billion.