Fitness is trendy, and VR is hot, so i can imagine, this idea have a bright future :)
But there is only one thing, what i dont understand, they have vr-sessions, so why need to go to gym? :) Okay, if you doing not usual exercise, like football or playing hero (two fluff, what they are mention in the homepage), its good, if you have ability, but whats the sense, if you going a gym, and doing oldschool gym-activites there, but in vr? You can doing it at home :)