It's not a bizzarro world, it is a PRECISE POLICY.
So in this case the policy is 'Let's profile the 17" as a pro machine (hence the higher PPI) and the 13" and 15" as mainstream consumer machines, and just to make the distinction crystal clear, we name the whole bunch of them Pro, including the 13" model'...?
Look... now that they've added a matte option for the 15", they've already introduced the element of screen options with all it comes with in terms of BTO handling of screens. Some warehouse in China would have four piles of 15" MBP screens instead of two. They're building them to order anyway.
- It would make no difference to retail stock since the Apple Stores would only carry the standard config anyway, like they do now.
- The OS doesn't give jack if you have 1440x900 or 1680x1050.
- A higher res screen isn't a 'geek' item, it's beneficial to anyone except the visually impaired.
Does the current policy help or hurt sales? I don't know, but personally I wasn't interested in Mac laptops at all until the 17" was equipped with a 1920x1200 screen. I wanted to get a PowerBook/MacBook for ages, ever since the Titanium PB, but the dealbreaker was that the screens always had jumbo resolution (much worse than now).
In 2001 I had a Dell 15" (4:3) w/ 1600x1200 res. The contemporary PB had 1152x768.
In 2003 I looked at 15" PowerBooks again. Now they were up to a 'whopping' 1280x854. Dealbreaker. I bought a Dell 15.4" w/ 1680x1050.
In 2005 I looked at PowerBooks again. Still at 1280x854, but now they had a 17" model. With... drumroll... 1440x900. Whaaaaaaaat? Are they for real? Dealbreaker, bought another Dell 15.4", this time with 1920x1200.
In 2006, at long last, they added a 1920x1200 option for the 17". It wasn't ideal (I would've preferred a 15"), but at least they had *one* laptop in their lineup that didn't have pixels the size of Oreo's, and from then on portable Macs have been on my wanted list. I got my first one in June this year. They could've sold me 3-4 PB/MBP since 2001 if they would've offered workable screens, do you think I'm the only one?