I think the problem will be "solved" for us, by simply doing a massive reduction in quality of the videos. The phones, the video cameras, etc, will simply save in a very "compressed" format, for "practical reasons", leaving most of the details out. Thus instead of having storage issues we'll have quality issues instead. But virtually nobody will be noticing them because 4K will be better than 1080 and seem like an "upgrade" that they are happy to pay.