No matter how long the very talented CGI artists spend on rendering, shading, lighting, texture-mapping, articulation and so on the best it can look like is good CGI.
The best CGI is no match for a real prop, set, model, costume or puppet.
CGI when used to replicate things that can be done using traditional methods always jars the eye and the film suffers for it. Good CGI should be invisible, like the augmentation of an explosion, or a liquid metal creature (which I still believe could be achieved similarly by Rob Bottin using practical effects and editing).
Good quote re Jaws. There's another quote I read in a book on Jaws and cinema theory and it goes something like; If Jaws had been made today modern writers and film makers would have felt compelled to put a fiesty female reporter on the boat to aid exposition for today's audiences and to break up the three guys on a boat dynamic. Something like that.