What kind of belief do you mean? I'm not sure if I understand.
Vegans/vegetarians tend not to eat meat due to some sort of moral belief that is bad to consume meat (belief is wanting something to be true which is not based in reality and facts) but due to factual knowledge basic in reality. Animal suffering and exploitation is a reality, same as meat industry being top contributor to climate change/environmental degradation.
This invention is more for people who want to stop contributing to animal suffering and environmental degradation from meat industry but are incapable of dropping out meat due to strong dietary habits.
This technology has no impact on vegans or vegetarians who do not like taste of meat, although certainly it may attract some vegans/vegetarians who still crave for taste of meat.