Played the Turok demo yesterday. The short: SUCKS
The long:
Control is pretty terrible. There's not even slight auto-aim, but that's not always necessary in console FPS games. However, when your enemies are fast, constantly moving, and use ambush tactics it is indeed necessary. You can't snap to a target with an analog stick. Against relatively fast and moving targets, you're just shooting around them most of the time. So, I spent 2/3rd of my combat time in that demo on my back tossed down by the raptors. The humanoid enemies are almost as bad, once they see you anyway.
On an SD screen (I don't know if it's also true of HD screens), you will miss important area details, suck as vines you can climb or paths you can follow. I was stuck in one area running in circles for 30 minutes because I couldn't see a vine I could climb until I looked straight at it.