“Bitcoin, the most common use of a blockchain, has proven to be tremendously valuable as a network for broad transparency and security”
http://www.coindesk.com/blockchains-and-the-future-of-audit/
The blockchain is the technology that will automate lots of stuff of the bureocracy, banking, managers of ledgers.. they will all be gone in a couple years thanks to the blockchain, so they better start to learn how to code or be a pioneer and invest now so you can retire earlier.
The blockchain itself will automate nothing. You can build software that will automatically makes entries to the blockchain, but that's not the point, because you can automate these things without a blockchain as well. The point is that by using the blockchain the authenticity of records can be proven beyond doubt, which is important in accounting and similar fields.