The danger of something like AI+drones (or less imminent, AI+bioengineering) can lead to a severe degradation of security, like after the invention of nuclear weapons. A degradation in security, which requires collective action. Even worse, chaos could be caused by small groups weaponizing the technology against high profile targets.
If anything, the larger nations might be much more forceful about AI regulation than the above summit by demanding an NPT style treaty where only a select club has access to the technology in exchange for other nations having access to the applications of AI from servers hosted by the club.