Perhaps the problem isn't the instrument looking cool it's the player looking like they're doing something.One solution is movement. ,one can set up sideways to the audience so the keyboard's not blocking the view,and put on a rave up. You know Hendrix also expressed the deisire for people to just close their eyes and listen to the music-he got tired of the circus act.Interstingly ,I've experienced African musicians who are playing super hot stuff,but adopt an extremely cool relaxed demeanor,as if it were effortless,a totally different style of macho poosing. In fact Africa is the origin of cool-read Flash of the Spirit by Robert Farris Thompson. One of the great things about percussion is it's physical enough that you don't have to exagerate wildly to look like you're doing something.