Seriously, try it out the level of immersion is insane, a more classic game feel can be amazing. But something where you move around is incredibly compelling. I watched a friend try to lean on a counter while cooking in Job simulator. I have hit basically every wall in my living room with a controller at this point as well as all the lights.
On the exercise front, Not every game is a workout but at the same time even something simple like the default valve bow game from the lab can wear people out. After all, you are holding a weight at arms length for a while and simulating pulling back an arrow. Its mot a motion that many people do regularly.
Go borrow one or go to some local game meetup and try some's roomscale handset. Its amazing. I'm thinking about taking mine to the bar up the street on a weeknight hooking it up and getting everyone to try it.