Projectors struggle to remain visible in daylight.

In 2014, a sleek promotional video took the internet by storm. It showed a thin rubber wristband that could project a fully functional onto the user’s forearm. In the video, people scrolled through emails, played games, and answered calls directly on their skin—even while in the bath. It looked like the ultimate "smartphone killer." The Hype and the Hurdles

However, as the months turned into years, tech experts began to point out massive :

If you are looking to today, you will likely find nothing but "scam" warnings or counterfeit listings .

The original company struggled to move past the prototype stage. While they occasionally posted "proof of concept" videos, the technology never reached a level that matched the sleekness of the original trailer. Eventually, the project went quiet, leaving many early backers without a product or a refund.