548
Nearly 500 smartphone brands have left the market since 2017
(www.techspot.com)
This is a most excellent place for technology news and articles.
This has been tried and I've tried one out back in android KitKat days. Glassless display and all. HTC phone. They're now bankrupt. The battery lasted a few seconds, and the display was not amazing, and even if done better today it's a gimmic at best