Credit and bank cards?

Hell, no. Advertising to all who manage to get a peek at them what your balance is?

The infamous Dutch OV-Chipcard, OTOH, could well use this feature, showing whether you've actually checked in or out, and on what travel 'product' you're travelling at the moment*). Balance again? No thanks.

*) apart from the overall fail that it is, there's a specific fail when you transfer from, say, bus or tram (traveling on card balance) to train (traveling on subscription). You have to check out when leaving the bus, and check in when boarding the train, but if that's within 3 minutes the system considers this changeover to be 'continue using the previous travel product', which means it's NOT using the subscription. A travel mode display would show whether it's using the intended product or not.