19 inch laptop!?

Is it me or are laptops getting bigger and bigger? I dont understand why people get large laptops. It kinda defeats the whole purpose of laptops which is portability (unless you use it as a desktop replacement). So Samsung is coming out with a new 19in laptop which weighs about 10 pounds. Who wants to carry around a 10 pound laptop? Anyways, the cool thing is that the screen detaches and presto..you have an lcd.