I dont know how it is in other countries, but here in Quebec we basically have a few different kind of macro/micro beers: 1. Big beer like molson, coors or imported stuff 2. Quebec macros like Boreale that are similar to the big stuff in taste but less omnipresent 3. Companies that make beers like micro but have more of a macro scale of distribution: Unibroue, alchimiste, st-ambroise 4. Microbreweries whose beer can be bought in specialised stores, specialised restaurants and (recently!) supermarkets. 5. Local microbreweries with little to no distribution

As I grew up I steadily shifted from # 1 to only drinking # 4 and # 5 (with the occasional # 3 or # 2, but only if there is nothing else). So I doubt that we will be seeing our favorite beers go away, the market if just too diversified!