This year 3D films look set to be bigger and more expensive than ever - with Werner Herzog's Cave for Forgotten Dreams just out in the UK, the latest Pirates of the Caribbean installment on its way, and offerings from Spielberg and Scorsese. But has the novelty worn off? Neville Hawcock, deputy arts editor, puts the question to Peter Buckingham of the BFI and Nigel Andrews, FT film critic.
