Something large, with high ceilings. And one whole side would be glass and face the ocean. There would be no trim or architectural details in this box. Just white walls and white floor.
All I would have in this box is the following:
A morosso print sofa facing the ocean.
a Noguchi lamp:
Oh, I guess I need somewhere to set a bottle of champagne, so I think this table from CB2 will do the trick: