Deep sympathy for the players involved.
I'm not sure this will lead to wholesale changes within the sport though. There have been calls to ban boxing for years, due to head injuries and damage to the nervous system, Ali being the obvious high profile example, as well as a few deaths along the way.
Headguards were made mandatory for amateurs in the mid 90's, I can't remember the exact year, but were abandoned in the middle of the last decade, as it is disputable as to whether or not they offer greater protection.
I only boxed competitively once with a head guard and, I have to say, I hated it. The affect on peripheral vision made me feel very vulnerable to hooks, and if the guard slipped round at all, vision was obviously further obscured. I'm pleased they didn't come in until the end of my time competing.