I don't think this series of events signals the end of ICOs. Regulation is inevitable. The strongest ICOs will still find a way to succeed, with or without government regulation.
I also think that ICO will not end but more tightened for some reason.
ICO's success is not from regulation that prevents them, but how an ICO team can manage strategy, convince investors, sell or buy.
they are all important elements of the success of an ICO Project.