Same reason why the original Star Wars movies were WAAAAY better than the prequel trilogy. They actually made things, props, animatronics. Stuff you could touch and look at and interact with. Actually seeing a giant T-rex staring at you is nothing like staring at a cardboard cutout or a tennis ball on a stick.
http://silver-ray.deviantart.com/art/Dilophosaurus-Umbrella-512909263 I painted a children's umbrella with a dilophosaurus dinosaur from the movie ' Jurassic Park ' Can't wait for Jurassic World! You can get my dinosaur book at http://amzn.com/1512103799