You don't keep redisigning the wheel when it works effectively.
This is a ridiculous position to defend.
Apple is all about style and design. Style and design always change. If there was such a thing as a perfect style or design then every pair of pants would be identical. every car would be identical, every TV would look the same, etc. etc.
There are a million things that could be improved on the mbp, for example.
1) New flat, square keyed keyboard - The old pyramid keys pop-off, rub the screen, and have a small foot print per key, and too much travel.
2) HDMI output
3) Blu-ray support
4) Dock connector support
5) Better wireless range
6) Better ergonomics on case, less hard metal feel, slick, hard to hold, too hot to hold in lap due to conductivity of heat through the laptop housing
7) Better access to HDD, Ram, and battery
8) Magnetic latch
9) SSD drive support, possibly in combo with HDD to store OS for fast reboots and quick responsive GUI
10) Possible detachable or rotatable touch screen. To simulate tablet functions or use as a graphics input device with multitouch technology.
11) Different color. Silver is just plain old looking. It looked state of the art in 1999 but now it looks cheap. Black matte is so much cooler and in style.
12) Higher res display. Resolution independence is just around the corner, why not have a laptop that supports it now.
Trust me! When Apple released the first PowerBook it blew people away. Everyone had to have one and it set the standard for generations.
In 2000 when Apple released the TI. It was like no other laptop before it. It not only turned heads but it oozed top of the line features and the competition was green.
In 2008, the mbp is a frankenstein of design. Apple slams updated parts into the same old design without thought at re-designing to improve function. It is not distinctive and it is just matching specs with other manufacturers.
Sad! Let's hope Apple devotes a little of that creative design talent to the MBP in the next update.