The Event Cinema sector has been around for many years, with experiments taking place as soon as digital projection was a workable reality. Digital conversion has acted as the main driver for Event Cinema. In both France and the UK, where we have comparative data for 2013 and 2014, there was a significant jump in Event cinema revenue in 2014, the first full year after complete digitisation.
Source: IHS Technology: Event Cinema Develops Into a Global Sector – Celluloid Junkie