ideal bathrooms

Today in class we were asked the question, "Why aren't bathrooms designed using newer technologies?" The main answer given by the group presenting was that such appliances were not cost efficient...they cost too much money! To counter that argument our professor pointed out that new buildings cost millions of dollars...so what is a few thousands dollars more towards bathrooms? I have an idea. It is not the cost of these new and better bathroom appliances, but rather the companies producing these appliances. There is not enough production of the variety amount of new technologies. If there was more demand for such appliances then there would be a greater supply. If we do not start to invest in newer technology the demand is not there and likewise the supply will be low.