If I had to guess, I would say that this vehicle is aimed at the "baby boomers".
Those of us who want style but can't quite bend down like we used to to get into a low slung coupe. The ability to sit a little more upright than leaned back. A large enough stowage area for carrying those walkers, wheelchairs and boxes of wheaties on those jaunts to the supermarket.
Something that proides a comfortable, stylish, cocoon-like environment without being the size of the Queen Mary. A BMW that caters to that group of people who would never buy a Cadillac or Lincoln, but do want the comfort and capacity.
But that is just my opinon.
Older and slower, but still able to contort my way into an SRT6 coupe and lovin' it!