“Does gesture control really have a place in digital signage, or is it a flash-in-the-pan trend?”
Gesture controls allow touch-free interactivity that can be used to enhance the viewer experience. I see this capability as more of a trend than a staple to signage solutions. In the beginning, it gained a lot of attention due to the fun factor, but I haven’t seen it grow significantly in use in the last 10 years.
As with any digital signage solution, your goal should be to communicate relevant messages based on your audience. Be clear. Be concise. Be current. Any trend can enhance or distract from your goal. Choose to enhance your experience based on your audience.