I saw the car last Month. BMW had a road show and were travelling around with it in a container.
It was a loaded pre-production LHD 540i. RHD production not slated until Jan-Feb.

Couldn't take any pictures as they took the phones of everyone.

Side very 7 and the rear a 3. Front treatment was lovely. The sculpting around the rear window from the high shoulder line looked good too.
Front over hang looked a bit long to my eyes. The bonnet gap looked big almost as if it was slightly open. It's a big car.

Interior, every bit a BMW but I think there's a marked upgrade to the dash materials. One of my pet hates in the bigger BMW's is their widespread adoption of Dakota leather.
This thing I believe had dakota leather but the BMW genius over from Munich couldn't confirm that. The heavy sculpting on the seat faces hid it well though.

Only saw it under indoor lighting so didn't get to see it in daylight.

Thought he said it was starting off at around €52k so a bit of a jump from the F10 although it may be loaded with extra gizmos as standard.