The pixel density of 1440x900 on 15" is pretty piss poor if you ask me. I used 1900x1200 on laptops for about 4 years before i moved onto apple, and all they could offer was 1440x900 on their 15". Jeeze, i thought the standard was 1680x1050 on 15" by now!
1920x1200 on 15" is hardly impractical, unless you're old enough to need reading glasses. Works fine, and great if you value productivity.
Yeah, most laptops with 15" 1280x800 also cost 1/4 the MBP. Sony have 1600x900 on their 13.3" for ages now. The worst thing about the MBPs have always been their screens - sub par and somehow people seem to think they're great. The screen alone almost stopped me from getting the current MBP this time....