I predict that within five years cork will have disappeared from Europe, as it has in Australia, New Zealand, and now increasingly in South America. And screwtop is so much more convenient, as others have stated.
Cork hasn't disappeared from those places, nor will it disappear from France in our lifetimes. I can guarantee that. It's not about snobbery. It's about tradition. And tradition dies very hard here. There are plenty of winemakers here who will never switch. And it will take a good bit longer than 5 years for them to die out.