I would imagine some would. The early pioneers of bitcoin mining may soon be irrelevant in the btc mining industry. As btc mining starts going into a direction of industrialization, the folks who enjoyed mining will look towards other digital currencies. However, the folks who are more interested in being part of a mainstream digital currency will put their efforts in pushing btc even further mainstream through a variety of means. As for what is that next coin? That is difficult to determine. It would be a combination of the miners involved, community support, etc...