Provenance (tracking of goods) and Regulatory compliance seem to be the most important use cases related to supply chain, and these can be broken down into several sub-segments.  

By documenting the provenance of goods as they move thru the supply chain, the breadth of recalls can be reduced and problems within the supply chain can be more readily isolated, diagnosed, and resolved.  Regulatory compliance can be verified as goods move thru the supply chain as well (inspections, quality controls, etc).  Tracking of goods can assist with inventory management and inventory tracking, especially when components are manufactured in several different countries and assembled in another.

As for change in practices, blockchain will demand more digitalization of the applications/processes at the various steps within the supply chain.  For example, there are often delays at import terminals/ports due to missing paperwork (bills of lading, etc.)  By going digital, this information can be transferred in real time so that terminals can plan and execute more efficiently without compromising privacy.  But this, as do other scenarios, will require shippers, receivers, etc. to digitalize their information, and/or export their information into the blockchain system via an API.

That's no small question. I'm partial to projects bringing down the barriers and making blockchain technologies more accessible. As the supply chain continues to become more global, people will want to know if the inputs to the products they buy are made ethically, and following sound labor and environmental standards so I also like seeing solutions that bring more transparency to supply chain and logistics.

One company specializing in blockchain supply chain and logistics is Block Knowhow. Block Knowhow offer users unfamiliar with blockchain a working hyperledger blockchain that the visitors can participate in - in a non threatening way - by just responding with their interests and experience in blockchain to see their results graphed in real time.

Block Knowhow also offers HyperledgerHosting - a GUI tool that empowers developers with the controls of Hyperledger Fabric functions from the Command Line Interface to management Hyperledger Fabric Clusters of Servers that support the commercial development of blockchain solutions on a distributed ledger platforms.

Long term, another area where I think blockchain will have a profound impact is in the area of education and credentialing.