The difference is, as per the article, that the Japanese operator wants to re-imburse the WiFi hotspot subscriber. Something which is very much alien to BT's way of thinking.
Of course, whether blockchain is the right way do implement that aspect is a different question, and in terms of implementation I would agree that blockchain is un-necessary. But you know, blockchain bandwagon .....
I still have memories of people like lawyers desperately asking me how they could use blockchain in their practice.
Blockchain is an easier buzzword to convey than 'Distributed ledger'. Distributed ledgers long predate BTC, but it is one of the things that make a 'blockchain', a 'blockchain'.
They don't require a system with it's own set of tokenomics, decentralization, Proof of work... it will be a centralized distributed ledger for managment and visibility of the network; i.g. a blockchain.
the 'blockchain'