Why can't we software emulate this? We have webcams, we know roughly where light comes from and how much. We should be able to turn those sources into 3D model

Why can't we software emulate this? We have webcams, we know roughly where light comes from and how much. We should be able to turn those sources into 3D model lights and illuminate a virtuall screen, perhaps even with onscreen objects having some texture, like raised. Button in browsers. Better yet, how can we get just away from screens more without getting bored? I love screens but there's a limit. Gaming and online content are pretty much the ,ain leisure activities that don't involve food or alcohol (and all the health issues of overeating and drinking). Seems like we used to do more other stuff.