Recently the Swedish Riksbank came out with a new report their digital currency project, the 'e-krona'. Browsing through the report, this line caught my eye, a quote (from page 14):

E-krona can be either in an account with the Riksbank or value-based units that can be stored locally on for instance a card or in an app.

Maybe holding a bank account at the central bank isn't that far fetched anymore. It would definitely give the banking industry a much needed fresh wind of competition for deposits.