Ack, I WISH we had this problem. The truth is that most grass fed beef farmers are not exactly raking in the dough, but there actually is a supply problem already. I am estimating, based on my own business, that demand already exceeds supply, but there is a bottleneck in the middle- processing, transportation, and distribution. We badly need infrastructural investment. Sadly, some of this is because in the 80s and 90s the government made these regulations that were based on what is appropriate for industrial producers. A lot of middlemen went out of business because of it and small slaughterhouses remain scarce. Things are getting better, but there is a lot of work to do. In general, with more consumer interest, there is more investment and thus the supply increases, we just need to smooth out bottlenecks caused by the government's bad policy.
But I sincerely doubt most Americans want to eat this way. Whenever I help organize a tech conference I try to suggest that we have other food besides bagels and pizza. People act like I'm nuts. One guy said "pizza and bagels is working for us, why spend more money?" I suppose they don't know or don't want to believe that those things aren't good for them because they are appealing and cheap.