Highlights: EfficientDynamics features, 300-hp turbocharged 3.0-liter inline six-cylinder, 400-hp twin-turbocharged 4.4-liter V8 engine, 2+2 seating
Complex says: BMW billed this follow-up to its "four-door coupe" as a concept, but there's almost a 99.9% chance you will see this car in showrooms come 2012.