Cheers echoed through Mexico City’s Roma district when the eponymous film by Alfonso Cuaron won three Oscars on Sunday, but revelers let out a disappointed sigh when best actress didn’t go to the indigenous star of the ode to 1970s life in the capital. In a payback for Cuaron’s black-and-white tribute to growing up among 1970s Roma’s handsome villas and apartment blocks, city officials set up giant screens in a park to watch the live broadcast from Los Angeles.