This thread has generated a lot of interesting comments, and it has made for some great reading. Anyway, here is some food for thought...
David Hancocks, who is revered as a zoo legend for his work with the Woodland Park Zoo, Arizona-Sonora Desert Museum, and then later on with both the Melbourne Zoo and Werribee Open Range Zoo, wrote a fantastic book called "A Different Nature: The Paradoxical World of Zoos and their Uncertain Future" which was published in 2001. I'm sure that many of you own this manuscript, and there is a lot of talk about immersion landscaping and modern, naturalistic animal enclosures in zoos within the text.
Hancocks: "The most compelling and obivous impact on visitor attitudes toward wildlife is the way that zoo animals are presented. This is why quality of exhibit design is of paramount importance. The validity of the zoo experience hinges on the functional AND visual integrity of the zoo exhibits." He goes on to discuss a lengthy survey done at the Melbourne Zoo in 1988, where visitors described gorillas as "vicious, ugly, boring and stupid". Two years later, after the gorillas had been moved from a concrete pit to a large, naturalistic exhibit the responses in another survey used words such as "fascinating, peaceful, fantastic, and powerful". Hancocks states that "attention to precise detail is essential". He even mentions the "crude-looking monkey and ape exhibits at such British zoos as Twycross and Howlett's", and admits that those seeminly outdated cages are praised by English zoo "apologists". Hmmm...