IPv6 would actually help the network because no more NAT means more nodes accepting incoming connections. That's good because it means data travels faster from node to node.
IPv6 means no more NAT? I think a lot of people will still put networks behind NATing firewalls just for some 'security by obscurity'. If IPv6 means everyone just plugs every server, workstation and device up to the internet directly, oh boy... going to be a lot of job security for network security experts