Sconces can be nice in decorative terms, but for me one of the mistakes people can make is building their home theater lighting around sconces.
Not a few times we've had people wondering how they can get a good image with some lights on in the room, e.g. for sports watching with pals, or just if they like a bit of light on. But then you see they have used sconces, most of which throw light out in a wide direction, inevitably washing out the screen images.
More focused lighting - pot or track lights - works much better to give flexibility, allowing light to be focused only over the required areas vs sending light toward the screen as well.
To my mind, sconces make sense so long as you also have some focusable lighting integrated in the home theater room as well.