Public safety scanning, yes. For the most part, it's ending or has already. But there's so much more out there beyond that. Milair, weather spotters, news crews in the field, security, schoolbuses, aircraft, etc, etc, etc... lots to monitor out there and will be for years to come.
I see if just the opposite. I see Business/Industrial going away faster than Public Safety, as that's happening already. That rules out security and school buses unless a scanner comes out that supports MotoTRBO and the like.
News crews have been illegal to monitor since the revised ECPA of 1994 which was changed to include (prohibit) STLs, IFBs, RPUs, and the like.
Aircraft/Milair are about the only thing that might be monitorable for some time...