I think we're a long way from getting bikes onto trains, we're still a way from getting all the people on the trains in rush hour. There are too many limitations in terms of platform length on a lot of the commuter routes to enable an extra carriage and the timetables are too tight to allow any solution that takes time to load/unload bikes.
Decent bike parking is more likely, but easier would be more people riding crap bikes that aren't worth stealing (although I understand why people don't want to do this).
I think we're a long way from getting bikes onto trains, we're still a way from getting all the people on the trains in rush hour. There are too many limitations in terms of platform length on a lot of the commuter routes to enable an extra carriage and the timetables are too tight to allow any solution that takes time to load/unload bikes.
Decent bike parking is more likely, but easier would be more people riding crap bikes that aren't worth stealing (although I understand why people don't want to do this).