Yeah, and actually electric motors are banned from some professional racing because they have superior acceleration.
My point is, imagine a new "efficient" 3D card that used 1/2 the power, but had 1/2 the performance. Sorry, I'm not buying. Make a low power version by not compromising performance, but by using a better manufacturing process, or design.
Personally for me, in fact, any extra thermal or energy efficiency, I'd like to see plowed right back into 3D performance. Other people might go for power. Point is, I want more efficiency, and I want it to be up individuals to decide how to "spend" the efficiency: "conservation" by having the same capability as before, but with less energy used, or "better performance"
In no cases will I except a "rollback", that is, I do not subscribe to "conservation" by "sacrifice"