Yes it will. Cathay Pacific and Dragonair will work with the relevant airport authorities to ensure you are no longer required to present a paper boarding pass.
Simply click the link to retrieve Mobile Boarding Pass, and then proceed to immigration, security and boarding gate in order to enjoy the complete paperless experience.
Only some airports accept a Mobile Boarding Pass.
Be sure to arrive at Boarding Gate at least 30 minutes before the departure time to avoid unnecessary delays. Late passengers may not be accepted and boarding gate will be closed 10 minutes prior to departure.