I don't remember Easter Island being this detailed on GOOGLE EARTH when I first checked on it. However, GE updates a lot and it was what seems like years ago when I first started playing on GE.
One of the cool things about GE is how well they have incorporated information into their mapping. I like how over the last year they have really incorporated pictures into their layers without having to go download anything.
The Easter Island maps are no different. They have lots of images of the little stone dudes for you to view. Click on their pictures to view their data.