Food For Thought

Now that there is all this low fat etc food on the market, do you think eventually, since it is better for our bodies and all, that the regular of foods will go away? I don't think they all will in time or anything but like, if low fat Poptarts taste the same as regular ones, and I only buy low fat, as do other people, and just say hypothetically everyone does the same, why keep the regular ones on the market at all?