I may be ignorant on some things, I may supply false facts, and I may be ranting but I'm gonna post this anyway, but not on an offensive note but as a rebuttal. Hope someone can confirm my statements!
It takes engineers to design a laptop to provide quality experience to the person who is using it. In a laptop, the amount of space, the placement of hardware, the amount of cooling each piece of hardware receives, the airflow, the placement of fans, etc. are all considered and thought out. You're argument is based on desktops. Sure, I can take an ATX tower, stick in a bunch of fans, and replace the hardware for the next 20 years and it'll still be cool. Really, you don't worry about a "noisy" desktop with full size speakers or decent headphones attached to a built-in headphone amp sound card or lug it around (unless you go to LAN parties, then you get a small form factor).
I've used laptops that are straight out awful to laptops that are near pristine in user-experience. A big, bulky, finicky, plastic, laptop with noisy fans can sure do the job of cooling a laptop with a cheap price tag but it would be very painful to use and to carry. Apple's unibody design allowed a larger, better battery than most.The Macbook and Macbook Pro are hands-down one of the reasons why someone would buy a laptop, nevermind the OSX.
Legal licensing is a problem for a consumer, because if two different companies, who patents their own inventions, do not want to work together, then technology can't be delivered at its fullest. It's like one company who owned all of the peanut butter brands suddenly forbid the combination of peanut butter with jelly because they want everyone to use their peanut butter and hummus combination. It affects what can go in the market, and therefore what's available to the consumers.
Apple hardware can use Windows 7. I don't see how Apple hardware value is increased, rather it would decrease, if the OSX can be supplied to any third-party computer maker. Hardware is hardware, most if not all are the same.