I'm happy to just listen but audiences do tend to want to be visually entertained.I hate to say it as much as I love guitar music watching someone play ,sitting or standing isn't very interesting to me.The things that make someone intersting to watch don''t have that much to do with the instrument. You can make a face like you're in pain as you bend the string if you're playing blues-works for BB. I guess the corresponding schtick for ambient would be a sort of ambiguous blank look. I heard John Fahey play several times and he didn't ever speak or look at the audience.One show though at the end he just sat there looking at the audience,after people started getting uncomfortable he said, "That's it you can go home now." and continued to sit there. Bigger motions carry better ,visually from stage. ( in the talking heads movie back stage is the sign "everything on stage must bebigger than life")This is why long limbs are preferred for dancers and models.it's also why pre-film actors used much exageration,which carried over into early silent films and why rock guitarists have to strike such extreme poses to make little triplett pulloffs seem hard. I'm all for providing other sorts of visual stimuli , uplighting Form the ground up is very effective,projections,dancers,strobes, anything except smoke machines -yuck. There are some cool lights that change color called Sauce ,they can be set to go through cool or warm or full spectrums.Having the colors change very slowly can heighten the sense that the music is evolving-even if it's not.Low lighting helps the audiences imaginations be more active. Another way to be creative.I like it when people dress creatively for stage too. It's true Gear racks aren't very intersting not from the house anyway at least set an invisible woman model on top of it or an esspresso machine or someting. maybe a nice fishbowl.