Although Chris considers blockchain to be less 'innovative' than machine learning (it is 'just a database' after all), its potential to revolutionise the banking system is clear, from the ability to cope with the amount of transactions implied by the Internet of Things, through cost savings for retail and wholesale banking, to the possibility of disintermediating banks altogether - if Government and the Regulators can be persuaded to allow this to happen.  

A bit of a bleak outlook proposed for challenger banks - though I'll still be waving my pompoms for them.