On a "not so light note", it would bring heavier traffic and congestion in the network which would result to slower confirmation AND higher fees.
With or without India, Bitcoin's usage is increasing on a daily basis, meaning that we'll see the network get flooded with many more unconfirmed transactions in the coming months and years.
If we look a bit further, it's safe to say that the entire crypto industry isn't ready to deal with this magnitude of growth. The only thing we can do is try to catch up, but in most cases, the growth will always be a step or two ahead.
It's clear that we more than ever need off-chain scaling solutions to be implemented, otherwise we'll be up for much more network congestion, and that's not something we should allow to happen.