1. The English Premier League is set to introduce a new semi-automated offside technology powered by iPhones, known as 'Dragon'. 2. This system, developed by Genius Sports and Second Spectrum, will use at least 28 iPhone cameras in each stadium to capture high-frame-rate video from multiple angles. 3. The technology aims to replace the current VAR system, which is often slow and sometimes incorrect, and could be expanded to other sports in the future.