I refer you to Swiss Air Flight 111.
At that point in the investigation, the crash was generally believed to have been caused by faulty wiring in the cockpit after the entertainment system in the plane started to overheat.
Investigators identified evidence of arcing in wiring of the in-flight entertainment system network
The TSB made nine recommendations relating to changes in aircraft materials (testing, certification, inspection, and maintenance), electrical systems, and flight data capture
As a result of incidents like Flight 111, new entertainment systems must be tested, certified, inspected, and maintained - which is going to slow down innovation. Most passengers have tablets, laptops, etc.