A projection screen including a capacitive touch panel, such as a projected capacitive touch panel. The touch panel includes first and second glass substrates, one of which is patterned (e.g., etched with acid or the like) to form a diffuser. A conductive coating is formed on the patterned surface of the diffuser glass substrate, and is patterned into a plurality of electrodes for the touch panel. The system, including an optional projector, may be used as an interactive transparent display for augmented reality applications such as storefronts. The touch panel may also be used in applications such as capacitive touch panels for controlling showers, appliances, vending machines, electronics, electronic devices, and/or the like.