For now there are no consequences, just a heads up that in future release (read: something post WF9) we plan to replace this two with Elytron & KeyCloak
There are also numerous discussions on wildfly-dev mailing list about both this projects and their integration.
I would recommend you to subscribe to mailing list to be up-to-date with if you are interested.
In short, for WildFly 9 noting changes, but in 10+ we do plan to change quite a lot in this area.
Thank you, Tomaz!