Presumably in an effort to distance themselves from the negative images associated with traditional zoos, some places now refer to themselves as safari parks. They usually offer more space for the animals, but don't necessarily provide enclosures designed for the specific needs of the animals which they house or furnished with environmental enrichment. Nor do they always place the animals in suitable social groups, and so their fancy denomination is no guarantee of better welfare standards.
Also in an attempt to create a more positive image for themselves, zoos have increasingly justified their existence on the basis that they serve conservation purposes. Beside the fact that this does nothing to address welfare concerns, they actually do very little to save species from extinction. Their breeding programs are essentially designed to ensure the survival of captive populations, and if zoos ceased to exist, so would the need for most of their research.
For obvious economic reasons, zoos favor crowd-pleasing animals rather than endangered ones. A minority of animals kept in zoos feature on the list of species threatened with extinction, and an even smaller minority are released into natural habitats – partly because, having been born and raised in captivity, they wouldn't be able to survive in the wild. Endangered species are saved in their natural environments, not in zoos, which only divert attention away from real conservation issues and efforts.