I think large centralized organizations will even use blockchains internally to become more efficient and automate many workflows related to back office operations and accounting. These will not be public but will orove the legitimacy of the technology and will help in increasing adoption for public blockchains that are used in the best interest of its communities.
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They have already been attempting to do that and abandoning the projects, because they discover blockchain does not increase their efficiency. To the contrary, it is less efficient than the databases they already have. Since they are centralized, all they really need is a username and password for security. They don't need consensus or any other blockchain features. They can write code that approximates smart contracts to automate without needing a blockchain. Databases will continue to advance to meet corporate needs, but not as blockchains.