Today Lifehacker posted a poll asking what people's favorite laptop screen sizes are. At the moment 13-14 inch screens are the leader and combinations of either 15-16 inches or 17 plus inches create a clear majority. Of course this runs into a problem, one that runs into natural preferences of the herd.
Most simply different tools are best for different jobs. The same publication has addressed this problem already, labor ought to be divided among the best tools for the task at hand. Even low end x86 processors like the Atom can accomplish most people's computing needs. I love my Lenovo x120e and its E-350 processor GPU combination unimaginable not that recently.
This is why I feel compelled to write that if you have a large screened laptop you are doing things wrong. For the money you spend you can get one decent laptop, and an incredibly powerful desktop without spending anywhere near as much as you might possibly spend on a singular powerful laptop. Unlike my security related rants this isn't based in security or other factors. This is simply an argument of comfort.
With a desktop computer you can adjust the arrangement of your sitting, the screen, and the keyboard in three dimensions, as task impossible with the common desktop or laptop computer. Few computing tasks require at the moment resources beyond what can be offered by even the most basic processors. Spending a premium for a laptop with pro in the name often will cost more than just fucking buying a separate desktop to do all of your "pro" shit on.
Rant, rant, rant, rant....
I await an actual use case where a 15" screen "pro" laptop can be justified over the combination of a netbook and desktop computer.
Edit: I would actually recommend people who matter run at least 3 computing machines at the moment. The first is a desktop suitable for connected creative work. The second is a cheap portable. The third is a cheap portable on an older vintage. Seriously Netpg compiles on my PowerPC G3 iBook just fine.