I've been looking at PC laptops that can do hd like the 17" mbp can(w/ the optional screen) and I found a couple, but none that weigh less than the 17" mbp.
One nice feature on some PC laptops that I wish Apple offered is 1680x1050 screens on 15" notebooks. I would get the 15" mbp, but I need a bit more space than the 1440x900(or whatever the pixel count) is.
Another thing that Apple does better is the whole buying experience. PCs STILL use technical jargon in their product descriptions and it can be frustrating. For example, instead of just giving the resolution of the displays, they insist on using terms like UXGA, WXGA,UXGA+ etc. What does that mean? I had to look the terms up on wikipedia, and the sad thing is some of them are still ambiguous. Why not just tell me the resolution? Even if you wanted to use those terms, you could say UXGA(1440x900), its not like it takes up a lot of space. Furthermore, if you buy from a manufacturer's web page, it can be a trying experience. Both Dell and HP have incredibly ugly, cluttered, and non-standards compliant web pages and it can be hard to figure out just what models they have. Am I looking for a laptop for the home or a media laptop? Whats the difference? Also, depending on where you go you can get tons of different prices/deals, you never know if you are getting a bargain or not....Apple makes the buying process very simple with a nice line of products and a very clean interface. Now granted they will sell you products that they might not have in stock for the next month, but nobodys perfect