Given that the transition from magstripe to chip-and-sign hasn't been so smooth (confusion among customers and cashiers for a few months), I can see why we haven't moved towards it yet. Merchants would be more nervous about additional lost sales because of customers not knowing what to do or not being used to having to memorize PINs for their credit cards.

PINs really only just deter someone from physically stealing your card and then using it, so until card theft becomes a problem, I don't think we're going to be moving to chip-and-PIN any time soon.

(On the bright side, Android/Apple Pay are generally good enough to function as chip-and-pin: it's as secure as a chip card, and don't allow thieves to use your cards unless they're either sophisticated enough to get past the fingerprint sensor, or they know your passcode. It's just a bit awkward to set up.)