That's because intel laptops have joke graphics while AMD's are good. Better laptops are hotter and less energy efficient, that is the price you pay.
That's not the only factor. Most of AMD's laptop CPUs are on 65nm, and are not capable of the same level of idle power. 45nm are coming out, but they still use more power than a comparable performance Intel CPU. Honestly, Intel's laptop CPUs are simply better. AMD has the better IGPs, but the solution to that is simply to get an Intel laptop with a better GPU.
As much as I wish that AMD was more competitive in laptops, the simple fact is that they can't compete for performance or power with the current 45nm Intel Core 2 CPUs.