VxWorks and Linux for automation systems

I will try again to upload this video link:

http://www.youtube.com/watch?v=xhudvva7mkw

I want to know what are the tools and functions that VxWorks software or in Linux software have that the others software usually don't have and with these tools and functions the programmers can program in easier way the automation system that is in the video link that I try to upload.

In this moment the disadvantages of VxWorks or Linux don't interesting me.

I will glad if you can added some useful links about program in VxWorks or Linux that are related to things that are program in the automation system that is in the video link.