It's not even just in Europe — some of our trains already do this well. I remember being impressed by a train on South Western Railway's suburban services where the in-train displays showed how full each car was, making it easier for passengers to find a seat. Some of our intercity services (and even Thameslink) show a diagram of each train before it arrives, showing which cars are first-class and which are for us mere mortals. It's really frustrating that the future is quite so unevenly distributed.