It becomes more interesting when you couple a flexible display with it.

...especially if that display could be a touch screen...

It's been tried with fluid instead of air.

	▲	robocat 11 hours ago \| parent [-]
		Link to video from article: https://youtube.com/watch?v=j_rErbhxNFM They show a few other interesting actuators in first 20 seconds of video.