nice report but I have to respond to:
"I never understood the purpose of 15" or 17" notebooks".
obviously you only look at computers from your own perspective and only consider your own needs. trust there is so much more to computing than you have seen.
for example (just a small take on this from my angle), some of us are using laptops for much more than checking email etc. i need computing power AND large resolution (and real graphic card). I do most of programming and development on a desktop but 20% of work is on site and I cannot carry desktop. netbooks just can't do what I need for work (no display resolution, no memory, no ports and no processing power). while i agree that 15" (and specially 17") is too big to routinely carry around, but there is no alternative. this why i use 15.4" (has all ports, plenty of RAM, dual core CPU, and one can find one with full HD resolution).
i would prefer 14" laptop if I could find one that fitts those criterias and has vertical resolution of at least 1000 pixel.