The problem is almost always complicated licensing agreements. Netflix will launch when and where they're able to offer a good catalog of videos.
Seriously, I check allflicks to see what's new and out of 10 new movies/tvshows almost always 7-8 of them are for kids. They might as well rename their service "Netflix Kids: Germany" or something.
It's one thing only offering a tiny subset of the US catalog but quite another to only add kids stuff. That area has got to be twice or three times the size of the non-kids sections.