Are there any models of the human visual field of view taking into account head, neck and eye movements and calculating likelihood of fixation?
Disclaimer: This answer is a bit self-serving because it only describes research work from the lab where I am a student. However, I think it's relevant for the question!

Coordination of eye, head, and hand

http://www.cis.rit.edu/research/vpl/publications/ExpBrainRes2001.pdf

Pelz, J., Hayhoe, M., &amp; Loeber, R. (2001). The coordination of eye, head, and hand movements in a natural task. Experimental Brain Research, 139(3), 266-277.

This paper analyzes eye, head, and hand movements in subjects while they copy a block pattern. It doesn't incorporate any of the neck movements as such, though.

Predictive saccades in virtual reality

http://www.journalofvision.org/content/13/1/20.full

Diaz, G., Cooper, J., Rothkopf, C., &amp; Hayhoe, M. (2013). Saccades to future ball location reveal memory-based prediction in a virtual-reality interception task. Journal of vision, 13(1), 20.

In this work, a virtual racquetball task is used to elicit predictive eye movements in freely-moving subjects while wearing a head-mounted virtual reality display (including an eye tracker). The VR display and racquet are tracked using a motion-capture tool. The results are mostly focused on eye-in-head but incorporate some neat methods for extracting gaze points using the virtual world, and for showing the data on a graph.