All depends what takes its place. If it's the North Sea and the Baltic Sea then many countries (Switzerland, Czech Republic, Austria and Liechtenstein) have a totally unexpected shot at developing coastal resorts with France, Belgium and Netherlands expanding their options. With stunning snowy alps backdrop, Salzburg-am-Zee would be my first port of call with both snow skis and water skis. From there onto Basel-am-Zee.
If the forces of nature conspire to keep the waves at bay we have a large landfill area for the rest of Europe.