Agreed.
I read an article on how they made GTAV and it was designed with the PC quite heavily in mind. I think the delay in release had more to do with optimizing for the next-gen consoles.
My guess is you'll be at MAXIMUM settings at 1920x1080 and 60FPS+ or darn close.
Read THIS: http://www.pcgamer.com/2014/06/10/why-grand-theft-auto-v-will-be-best-on-pc/