Rem Koolhaas, who was speaking to a sold-out South Bank audience on 'Metropolitan Apotheosis' this week, has had good reviews for his 43rd Street auditorium in Manhattan, just opened. New York Times critic Herbert Muschamp describes the scheme, along with the equally recent Future Systems Comme des Garcons store in the city, as architectural 'sushi' - but says something more substantial is now required. I am sure these architects would be happy to oblige . . .