I could care less about most French save the wine makers. Being tied to the land, wineries will not be able to flee the country and taxing them at 75% does not portend well for future prices or quality. Of course it will be a boone for Oregon pinots and California Cabs when the frogs drive down production in Burgundy and Bordeaux.
I hear Argentinian and Australian wines are decent.
Production of French wines may continue but people will discover that cheaper American/Chilean/Australian/South African etc. wines are just as good.