The same technology could easily be applied to simply blocking anyone who isn't verified (in the name of stopping spam, DDoS, bank security, you name it), meaning anyone not using an approved install of Windows/macOS/Android/iOS is shut out from the internet.
In the long term, in the name of "banking security", they're likely to add a mode that also lets you ensure your pages aren't tampered with by extensions, and there go all the ad blockers.