My impression of Java, as someone who ends up having to use it every few years when I can't get out of it, is that the cumulative effect of generics and autoboxing can really change the feel of the language, but only if you use them, of course.

Also, I thought real closures were introduced in 1.7? That seems like a big change to me.

Re: C# I was mostly referring to annotations for reflection. If they ever wanted to add first class getter/setter methods that would be cool, too.