LAS VEGAS — If you think Budapest, Warsaw, Prague and Las Vegas have nothing in common, think Estee Lauder. The company, which already has freestanding stores in Eastern Europe, opened its first such unit in the U.S. here Thursday, a 2,100-square-foot extravaganza with laser-shooting statues, flame-filled waterfalls and a sales projection of up to $4 million in its first year. Details are on page 8.