Chances are they will stick around for a long time, except I would expect that the schedules for them will change over time. For example, right now they are both nightly and will continue that way through the Halloween Time season and probably through the holidays as well. Next year at some point (who knows when), the fireworks, especially, could likely slip back into off season mode before summer and after summer/pre-holiday season, only running on weekends.
Only time will tell!