Yes I know I can make payments with my watch now. The trend is definitely moving towards cardless society however I think it will be a long time before cards are repalced completely. Most, if not all, companies provide card-based options for those that don't want to use mobile phones. I stil find cards easier to use in many instances. Some apps are just terrible.
The younger citizens will be targeted by new entrants into the payment system like Facebook and Google. These companies will not be providing any physical means to make payments. Weight of numbers will see the current Banks move quickly that way to head off the challenge. It will change quicker than you think and is already being planned now.