You may continue to use apps for now
For now, social media apps will continue to function. However, if it fails to comply with the new rules, the government will make decide the fate of the companies in India. The government might not entirely block the social media apps because they are a lot of factors involved but may levy a fine or stop the companies from doing business in India.
But for now, Twitter, Facebook and WhatsApp are not going anywhere you may continue to use the apps just the way you were before the whole IT rules fiasco happened.