You need to verify age for all these services already, if you offer those. (Except 18+ streaming).
E-ID will not changed those laws.
And if you don’t use these services now, you will not need E-ID then. (Except 18+ streaming)
And if e-ID is declined by the people of Switzerland, you will have to upload ID for 18+ streaming. This law is already thought and can only be stopped with a new initiative.