
So here's the scoop. It's been harped on about pretty much ever since Book I was released. People griped about the 800x600 resolution not being high enough. I seem to remember a poll that BW put out which everyone jumped on board to cheer for a modified Book I engine with a higher resolution. In a not so "Voila!" move, BW re-wrote the code to support 1024x768. Part of this involved having all of the artwork re-done to support said resolution increase.
When Book II was first released, there were actually some people who complained about the resolution increase. What!?!? Why would they complain about this "ten year old" resolution (BTW, 10 years ago I had a 24" Widescreen Compaq CRT that could do 1920x1200... resolutions haven't really changed much)? It was because their brand new netbook was not capable of properly displaying that resolution! 1024x600 was the highest their little 10" screens could display. OR, they had a machine that was just powerful enough to run Book I, but the increased resolution of Book II was just enough to choke their machine, even though in some aspects Book II had the more performance optimized engine.
I've seen quite a few comments that follow the formula: "I want the next game to support "X" resolution. There's no reason you can't do it." Even the "programmers" have chimed in, claiming that "it's really easy to implement... all you do is blah blah blah." To all those types of comments, I'll say this: You don't know. I'd say some other stuff, but this is a rant, not an invitation to a flame war...

BW made some design decisions based on factors that would fit the best into the game he was trying to create, based on the choice of programming language, and I'm sure in part based on his skill level. Therefore only BW can determine how easy or difficult it would be to change something like the game's graphics engine.
I can tell you with 99.99% certainty that the resolution in Book III will be 1024x768. Asking for higher will yield no fruit. It's just too much to ask for at this point for him to re-write the graphics engine a third time to accommodate. Honestly I don't see a problem with it... it plays/looks fine on my 20" widescreen monitor with a scaled aspect ratio. I think people have been far too spoiled with the lesser quality of LCDs. Yes, I said lesser quality. CRT monitors might be old, huge, heavy, and cancer inducing, but they scaled resolutions like no other. It's a shame that we have to settle for less with the current technology, and amazing that people can actually become spoiled by it.

Eh, I guess the ADHD is kicking in, 'cause I'm already bored with ranting. It requires far too much energy.
TL;DR version: 1024x768 isn't going anywhere. Get over it.
I'm going to go back to surfing the webz for Black Friday/Cyber Monday deals.