I think the era of real-time rides in the open world are over. However I would like to see them add real time rides in a quest line. You would board, ride for awhile, a boss would appear, kill the boss, then wait to arrive at destination. This has been done before, so I imagine they could do it again. It would be amazing to do on a Ishgardian airship or maybe even a Garlean train. Could you imagine fighting an enemy on the top of a moving Garlean train?