I think it is actually Adobe will no longer produce new updates for flash player on mobile device. They will still provide security patches if any vulnerability is found. The thing is that once Adobe made the announcement, I think flash only sites is going to be obsoleted soon. It doesn't make sense to make a "flash" site that would not support new mobile phones when more and more people are starting to browser the web on their smart phones. Most sites are already on HTML5.
You could still side load an one year old Flash Player, but there will be no updates (from Adobe) for hardware or OS incompatibility.