Jurassic Park isn't just a good example of CG, it also a good example of making the right choices on practical vs CG (in the context of technology of the time) and using a reasonable budget. You can have great CG and crappy CG by cutting corners. Plenty of people that decry CG don't actually know how much there is, even in non-sci-fi movies like romcoms, just for post-editing. But when it is done well nobody notices, the complaints only come when it looks like crap. Great use of technology to achieve the artistic vision will stand the test of time.