This meeting is the highest profile meeting to include consideration of longer-term risks in nanotech.
Excerpt from the report (link to PDF) :
"Military offence applications are particularly concerning because, unlike nuclear arms, verification difficulties mean there is no clear point at which opponents reach stability in the process of escalation and proliferation. Existing arms treaties may not apply to nanotechnology-based weapons, and there are important intellectual property, commercial confidentiality, and national security issues involved in addressing this challenge…"