The hardware is the easy part of Digital Signage, even when it comes to Projected Digital Signage by Looknglas.
The really important part is what you do with that cool hardware. With commercial Advertising or Point of Purchase (POP) messaging, it is so important to use that Digital screen, whether LCD or Digital Window, to the maximum effect. That means large size, but also, changing messages, looks, and especially, effects.
Effects are what you do with the graphic to make it interesting: Color, size, font, background, still images or motion video, movement, fading in or out, or any visual change or metamorphosis of the afore mentioned elements.
No one pays much attention to static signs; you perceive them in a moment and quickly discard them before even consciously taking note, in most cases. Using visual effects properly will not only give you attraction, but also "sticking". That is, retention, repeat viewing, or best of all, response to a good selling proposition.
Using effects properly also means not overdoing it. Constantly trying to out-entertain your competitors is a losing proposition. The presentation that gets them to look, consider, and respond is the most effective. Be careful not to get carried away with effects, but rather use them to mix up the look, as well as creating intrigue. The bottom line is to sell the viewer on whatever your proposition is. Don't go overboard with the creativity or the hunt for interactivity. Use effects to make a powerful selling proposition to your target, and they will notice and respond.