Whoa! Like the sound of it being a "sonic monster" that has even more of a widescreen cinematic sounds to it! We've seen her earlier live shows and they were just her, her stage band+ a string section and that really lent the songs a sort of timeless, ethereal quality. I'm thinking from what he says Ultra may well have a similar feel.
And yes it would be rather fun if the Black Keys spring up in her Glasto set too!