What kind of technologies are important?

Prefix delegation
automate address space assignment from ISP to customer
Service discovery
for more ease of use
Robust and stable routers
so that we can unify IPv4/v6 backbone
IPv6-ready root/ccTLD/gTLD DNS servers
To allow deploying IPv6-dominated/IPv6-only network
More educational materials for IPv6
New security model/tool for IPv6, something better than firewall
"Killer app" discussion seems moot
Web was successful because IPv4 was already everywhere
Unless we have certain level of IPv6 deployment, we will never see "killer app"