Unless China can be stopped in developing AI no one else will stop. That's not to say if China stopped tomorrow anyone else would exercise caution. AI is here to stay. My biggest question is whether it will remain a tool to be wielded or will we.
No one will stop anything.
If China stopped we wouldn't.
If we stopped, China wouldn't.
It's going to happen.
At the beginning of the industrial revolution there was a movement called the Luddites. They were angry at the machines replacing humans in the factories.
They thought by sneaking in and smashing up the machines they could stop the inevitable.
Spoiler Alert: It didn't work.

Adapt or die.