This morning I have been able to play with an Oculus Rift. I wasn't sure what to expect but the experience has blown me away. The control with the head movement is realistic and the feeling of immersion was crazy. I only had time to try the under the sea demo but that was enough for now until my own unit arrives.... I haven't included any video of the demo from my perspective as the various videos and youtube demos out there really don't do it justice.
In preparation of mine arriving I started watching the introduction to Unity videos on Digital Tutors http://www.digitaltutors.com/tutorial/1566-Quick-Start-to-Unity-Volume-1 and I think I will need to get back up to speed with some 3d drawing, it's been a long time since I used Autodesk Inventor or my all time favourite tool for 3d fooling about Sketchup.
This would have been an amazing tool when I was doing 3d images and walkthroughs of proposed building solutions some years ago. I haven't thought of what our commercial angle will be on this yet but I am sure we will think of something!