Its not like there are no european Ruby conferences that include many topics beyond Rails and even Ruby. E.g. wroclove.rb, eurucamp and even EuRuKo. So, I don't see the big news here.
Calling a conference "Railsxxx" and then not doing any Rails sounds weird to me.
Yeah, "big news" is relative. Maybe it's no big news, it's cool, too! We just wanted to share what our focus is going to be. People seem to react well (=> twitter).
Why Railsberry? => it's still for Rails devs by Rails devs. And we love our name :D
Calling a conference "Railsxxx" and then not doing any Rails sounds weird to me.