When the first computer-aided HMD was revealed to the world in 1968, it took until the early 90's for this application to VR immersion for performance to be explored. With the introduction of HMD's, the suspension of disbelief is becoming less and less necessary. The progression of pursuit towards a total-body immersion and complete transformation into a new physical form is the goal. The desire to build new dimensions of "belief" where time and space fall away and convincing is no longer needed will no doubt drive the technology. This is where the HMD and now the Oculus, is most useful.
While we have less and less patience with "underdeveloped" technology or technology that seems to lag behind a world more connected and immersed with an online design, I think the Oculus Rift has progressed enough to see the possibility of becoming a mainstream piece of hardware. Certainly with the recent publicity of new Oculus VR short film Lost making it's premier at the Sundance festival this week, even a Hollywood director and production company has been convinced that Oculus VR (just recently bought by Facebook for $2 billion) is quickly becoming a financially viable tool for the masses.
I used to think that the immersion was an escape to flee the unsatisfactory malaise of first-world problems. Can't get laid in this life? Try Second Life and a fleshlight. Want to murder the bullies of this world? Grand-Theft Auto them to death without repercussion. But physical and mental ailments abound and perhaps VR immersion tools can help a Vietnam or Iraq War veteran who lost the use of his legs or his sanity, to help them feel moments of virtual normality.
No doubt though, the virtual porn industry will be marching in the same parade (albeit at the back) in hopes that the mainstream will only see the creative and positive humanitarian force for good it can become. Perhaps the real suspension of disbelief may be that we are rushing to immerse ourselves as philanthropes and not not greedy misanthropes.