I'm going to say that the 15.4" is excluded from being a top-end laptop for having such a sorry screen resolution (and pixel density as follows) for 2009.
It is an issue. The 15.4" MBP is an expensive, premium laptop and it has an unnecessary deficiency.Not an issue! Its certainly not a deal breaker.
It's a bit of a stretch to assume a mains socket, desk and external monitor will always be at hand..If you have enough money to spend on a £1500 Laptop if you need more desktop space then you get a 1920x1200 24" or greater.
It is an issue. The 15.4" MBP is an expensive, premium laptop and it has an unnecessary deficiency.
It can't be put down to "things would appear too small", since even if it had its rightful 1680x1050 resolution, the pixel density would still be (slightly) less than on the 17".
It's a bit of a stretch to assume a mains socket, desk and external monitor will always be at hand..
The 17" is only 1.6" diagonally larger, yet has 77% more pixels on display. It works brilliantly. Explain?You don't need that sort of resolution on a 15.4" screen, the screen is physically too small to yield the benefits.