Thank mosx for posting a reply to my comments. I agree with you on some points but not on all.
I agree that Apple lags behind in the use of the GPU within Mac OSX, this will hopefully be corrected in 10.6. But they do this for a reason and that is to conserve energy. I have owned a Dell Inspirion laptop and it's video playback performance was in deed better. However even with some of the energy saving features on it would last for about 3 hours max. when playing a movie My MBP will play the movie, say lord of the rings and still be able to do 1.5 hours of web browsing and other stuff.
Do it must be said that if I want to watch a movie I would rather pop it into my dedicated DVD player and get a much better quality than with any PC laptop.
I don't agree that a wedge shape necessarily gives a better cooling. This has to do with the internal layout as well. Also more vents also mean more dust accumulation which has a negative affect on the cooling, just ask my nephew with his Toshiba. His Toshiba has had to be cleaned because it would run so hot that it would shut down.
If it were true that, the temperatures inside of the MB's and MBP's, were to have a negative affect on their lifespan, don't you think Apple would do something about it. It would be suicide for a company to put a product on the market that breaks because it gets to hot. Don't forget that the Mac community is small and news travels fast. And even the most loyal Mac Fanboy would be very pissed it that were the case.
As for "professionals" needing a laptop that is built to last. Yes you are right. But does this than mean that i.e. those thousands of pro photographers that use MBP's and MB's aren't professionals. I think not. And most of them use their laptops day in day out and yes sometimes they breakdown but so do PC laptops.
I don't agree with you that a wedge shape laptop makes for better ergonomics. If you want ergonomics buy a desktop. Laptops are inherently un-ergonomic, just ask any physiotherapist.
As for a user swappable optical drive. How many people do you think will do this? Answer not many. How do I know this, because I used to sell PC's both desktop and laptops. The funny thing was that a lot of people who came in to buy a desktop/laptop said they were going to replace this or that. But in the end almost none of them ever did. So why would Apple want to have user replaceable optical drives when so few a people actually replace it. It would cost them money in stead of making them money.
The MB's and the MBP's aren't perfect. I'll give you that. But any PC laptop that you can name probably has it's share of weak points too. Again I don't see the temperature thing as a major issue, but you do, you've made that abundantly clear. But I will say this my MBP out performs many of these so called wedge shape wonders. And I for one don't want a card reader or a replaceable optical drive, because I'm just as fast in whipping out a cable and hooking up my camera as I would be with using card reader, oh and before you wonder his desk must be a mess, it is but not with cables I asure you. I personally don't see the point of a user replaceable optical drive because in my eyes this would actually create a weak point in the design.
Oh and for all reading this I'm sorry this went completely off topic. I to wish to see new MacBook Pro's sooner than later