Man, what would I not give to see such an ecosystem(I wouldn't give this up for sure.
Below is a scale model of Moa, the dominant herbivore in the New Zealand eco system and to the right is the scale image of a Haast eagle attacking Moas. A truly majestic sight.
P.S: Image souce: Wikipedia
Had dinosaurs not been wiped out and had intelligent life descended from dinosaurs, it would have been a huge pity for one simple reason. Dinosaurs didn't have extenal genitals and hence dinosauroids couldn't have masturbated :)
Boy, that's a pity....