Here's a laptop that
An APU is a main processor chip that eliminates the main support chip by including the CPU and GPU (graphics processor) as well as memory management etc. on a single chip.
This makes the 2-3 functions work together radically faster by being tiny fractions of a millimeter apart vs up to inches apart when they are on separate chips. Distance apart = sloth in interaction of chips in an electronic device. This also radically reduces their total power consumption and heat production.
The result is a 15.6" screen fairly powerful laptop that can run up to 7+ hours on battery. There are other design advances that assist in reaching that efficiency but the APU is the main contributor. Here's a laptop that's a near equivalent machine with an I 3-2310M processor.
Of course there is the usual small price difference favoring AMD based computers over rough equivalent Intel based computers.