It doesn't help the whole "Practical Vs. CGI" Situation when you consider that it is at this moment SUBSTANTIALLY cheaper to pay 20-30 guys to make an acceptable-for-the-big-screen T-Rex in CG than to get all the electronics, raw materials; makeup artists, electricians, and all the other people that would be required to be there on a set with an animatronic T Rex. Not to mention having to keep the whole mess from breaking after pouring gallons of mineral water on it. Yes, the people who worked on the original Jurassic Park push the limits of what effects can do, it's just that doing the same types of practical effects with the level of technology we have would cost a buttload more than if they just did it in CG. If Avatar was remade shot for shot, frame for frame, but was done as much as possible with practical effects, it would cost at least half a billion dollars more.
Practical effects can still have a place, Guillermo Del Toro movies have proven that a dozen times. it's just that he also knows when you gotta do something in CG, despite what you might think would look better. I don't think that CGI is evil, or even lazy (most of the time), it's just that with everything being done virtually now, it's so much easier to create a world as seen in the minds eye. How else do you think that Dreamworks can crank out 2-3 movies A YEAR, with at least one of them being a brand new IP. But the ease with which you can go from concept to finished product also makes it harder to consider all of the options when making something. The only real limitations are what the producer says you cant do, and even then, sometimes it's not all that much. The few times that the envelope was seriously pushed were the few times that it cost a brag-worthily large sum of money to make a mostly, if not entirely, computer generated film. Now when I say that it's easier to make a CG film, I understand that it still takes a grueling amount of time and effort to make a movie that will hopefully make it's money back at the box office. I simply meant that compared to say a traditionally animated film or some of the older big budget live action movies, it doesn't take nearly as much time. As I understand it, it currently takes around a year and a half to two years of turn around between coming up with the Idea for a CGI movie (I'm using Dreamworks as an example here because for what they usually lack in Pixar quality is made up for in sheer quantity) which is close to the turn around time between most Harry Potter movies.
The only real problems I have with CG is that I don't see it on the realistic side of the uncanny valley as much as wish it would, especially now that we have the technology to do so. (stuff like Spirits Within tried really hard, but didn't quite get there) And I also hate it when directors like Bay or his contemporaries use it to compensate for their lack of attention to detail. I imagine that the one of the best things that a CG artist can hope to have asked of them is to make something that looks really cool. The only problem with that is that lots of directors tend to want cool stuff in their movie, not to have a cool movie.
I think this conversation has happened more than a few times. "This shot looks kind of boring. Hey, special effects guy, can you make something that looks cool so we can make this shot more interesting?" "Sure thing so long as I get my check at the end of the week." "I'll Double it if you make it the greatest thing you've ever done, but it's got to be done in 2 weeks or your fired."