I don’t think workplace wellness as it’s practiced today has much of a future. If you’re studying workplace wellness or plan to make a living trying to get people well at a workplace, I’d strongly suggest a plan B (suggestion below). Plan B is going to be much better.
The term and the practice of “workplace wellness” will go away completely. If you use that term five years from now, nobody will know what you’re talking about. Give or take a couple years, either way.
Wellbeing is a better term, but I think we’re all getting a bit “welled” out. Wellness might come to mean taking certain prescription drugs or vitamins, eating certain foods, or getting screened for disease at drug stores and other provider locations. The commercial product marketers are muddling the meaning of wellness. I think it will disappear from workplaces as a program element.