I believe your assumptions are incorrect. Vinotemp has been making large cabinet type humidors for many years. This is not new technology. Neither are beads or active humidification. Spanish cedar linings are not incorporated only for smell, they are used because the wood helps stabilize the humidity. The same reason cigars are not shipped in plastic boxes. It would be much cheaper to use plastic boxes but cigars would not shed humidity in such conditions. In many parts of the country and world the average humidity is significantly above 70%. Beads will help absorb excess moisture, but the wood helps as well. Much depends on the type of cigars and reasons for storage. NC's are not meant to be aged more than a few years as their tobacco is already aged several years before production. Cuban cigars are rolled much younger in general and can benefit from many years of slow aging in a stable environment. It is not necessary to age cigars in an airtight container, some transpiration and off gassing is needed.
