Not eating meat? We will likely be able to create synthetic meat that, even if it tastes like something that used to be alive and kicking or swimming never was. Heck, we could synthesize something like mouse-meat to please the kitties. It may be macabre, but I can imagine someone concocting a simulation of a certain flesh as a special treat for animals too small to kill and eat us or too well behaved to do so.
The ideal subject of totalitarian rule is not the convinced Nazi or the dedicated Communist but instead the people for whom the distinction between fact and fiction, true and false, no longer exists -- Hannah Arendt.