Will future employees get hired based on how well they prompt AI?

Yes and it is already happening while most people are still ignoring it. Prompt engineer is a real job title with a real salary and people are genuinely getting hired for it. The skill is no longer knowing the answer it is knowing exactly how to ask for it. Which sounds simple until you realize most people are terrible at asking for what they want. The future workplace will not reward the smartest person in the room. It will reward whoever can make the AI in the room perform the best. Start practicing now. Your future job description might just be "talks to machines really well."