Blockchain and decentralization are two key parts of intertwined ideas that together can achieve more of technological achievement we cant predict early. Possibly, machine learning protocols be used to gear up AI or in vital sectors like finance, health and space projects to bring newer discoveries.
Talking about west based social media giants, these would devour out more of blockchain mechanism to run their new projects, there would be added race also who would stay first to be in market competition, holding more resources and infrastructure and controlling the field respectively.
It all can happen prominently, but for that I think web3 or decentralization must also upgrade with time.