Well, yeah, if your laptop is always sitting on a table and you walk up and type on it without ever moving it, then you really have a desktop and weight is irrelevant.
But laptops get carried, they get held in odd positions while you're moving around. If they're light enough you can hold them above you in bed without your arms falling off. You can sit sideways on the couch and prop them on your knees. At that point, ever 18% lighter is very important.
But laptops get carried, they get held in odd positions while you're moving around. If they're light enough you can hold them above you in bed without your arms falling off. You can sit sideways on the couch and prop them on your knees. At that point, ever 18% lighter is very important.