That's the way it goes with fashion: it's on the runway in Paris in March and in a bucket at Big Lots by September. Mercedes-Benz' in-house tuning arm, AMG, has decided to turn with the popular tide and call time on horsepower brinkmanship, with the division boss saying, "We are going to use other ways to extract better performance, including weight saving, engine optimization and alternative technologies."

What's the new fashion? Getting the most out of the least. AMG is going to do that by losing weight, installing tech like the SL63 AMG's wet clutch gearbox on the coming E63 AMG, and possibly re-engineering Mercedes' diesel, hybrid, and four-cylinder engines for AMG duty.

Not too long ago, imagining an A-Class AMG would have been beyond comprehension, but this is the future. We just hope everyone has thought through the consequences: with the reins being pulled on increasingly powerful motors, this is going to put a lot of horses out of work. And that makes the possibility of an equine industry bailout something we can't rule out...