Americans are in trouble unless the UK increases exports. There they are, smugly denying us their resources like David Beckham on the bench. We need their creativity now more than ever, but they're not evening bringing their art on tour. The last several years have seen an explosion of immersive art exhibitions in England, from the interactive performances of Punchdrunk to the raging film parties of Future Cinema, and London's latest art environment is due to open tomorrow underneath Waterloo Station.