Do you dare to imagine a future where “chairwoman” and despotic Barbie Ivanka Trump is celebrating her 30th year as leader of a fascist police state in “New San Francisco – Capital of the Americas”? Chances are you’d rather not – especially when the image comes with haunted waxwork Jared Kushner by her side. However, it’s a hypothetical reality that Asif Kapadia (Senna, Amy, Federer: Twelve Final Days) is willing to imagine. Granted, it’s the cheekiest, blink-and-you’ll-miss-it frame of 2073, a small dash of humour in a film which doesn’t give you much to chuckle about. Set in a dystopian futu…