I am a chef instructor and move around a lot. I want a machine that's small like a netbook (10 -13)to hold my recipes, calendar and spread sheets. I also don't see well... can one change the netbook resolution down like on a PC to get larger print?
Running a small netbook screen at a low resolution will be annoying. It's like trying to use your regular sized monitor while staring through a cardboard tube, You only see small sections of the entire screen.
As you move around alot weight is an important consideration but usability is also important. Go to a store and look at the different sized screens and feel the heft of the units. A 14" screen may be as small as you want to go if you don't see well.