Does anyone remember the Virtual Boy? It was a big flop for several very important reasons...
1. It was monochrome... A color display would likely have been very expensive, so this makes sense
2. The one color was RED! Red is not a good color to be staring at for long periods of time. For comfort's sake, it should have been green.
3. It wasn't head mounted! It hurt your neck using the stand. I got around that by propping it up on my face while I layed down, but most people just aren't that creative, and even the ones that are aren't going to want the weight on their nose... It was a real pain to use.
4. To get the best use out of it, you had to use it in pitch black. Any and all light interfered with the view, and the light blocker thing wasn't always good at blocking the sides.
I guess it was a doomed project. I, personally, think Nintendo did it on purpose to turn people off Virtual Reality for a long time, but they can only hold it off for so long.
I personally loved the system, though. I was waiting patiently for the first RPG to come out, but it never came to my local walmart or target, and then they canceled it! I spent hours playing Red Alert and Mario's Tennis, but you can only have SO much fun with just two games. I ended up giving it away to some friends...
So where is virtual reality now?
Visual: We have that allready. HMDs are very real, and compatible with mainline 3d processors, but not the consoles. They're not that good, though, because they are tiring to wear and don't always work right. You have to be good at making adjustments to get them to work for you, and everyone who wears it will have to adjust it again.
Sound: We have had that for a while too. It's called "Surround Sound" and "Dolby 5.1" HMD's have things that detect which way your head is tilted. This can easily be translated into spatial sound as well, and come one step closer to true virtual reality in video games.
Touch: This is the next step. This is the Holy Grail of Virtual Reality development. To have realistic touch is a big dream, but it isn't plausible yet. They have a "pen" device that you can use to poke virtual and distant objects and feel pressure in the poke, but nothing along the lines of gloves that can grip an ak-47 or the neck of some alien. In place of that are the realistic controls for things like Mech Assault (or whatever Mech Warrior game uses the controller, I forget what it's called) and guns in gun games. These devices often offer force feedback, and some people have fitted them with pain inducing devices... I think I'll stick with my dual shock 2(which, of course, is just force feedback)
Smell: This exists, but I don't know how effective it is, and I'm not sure how much it costs to run... It mixes chemicals, so I wonder how safe it is... I mean, it's possible a virus on a computer running this thing might actually kill someone by mixing things that shouldn't be mixed... I don't know, though. Im not all that ready to try it. Nintendo, however, did make use of scratch and sniff cards for Earthbound... A fun, novel concept for sure.
Taste: Most people "taste" with their sense of smell. I say most because I am one of the people that actually tastes the full spectrum of tastes with my tongue, and not just the base "sweet, salty, bitter, sour." I know this is true because I have actually lost my sense of smell entirely (for periods of time, not permanently), but food doesn't taste any different. For most people, the only thing the tongue serves to do is relay texture for the food. That would go to "touch." and I don't think they're even close to being able to replicate the feel of liquids...
I don't know what to think of the further entrance into the world of Virtual reality... Escapig too far can be dangerous, and there will be some people that just won't want to leave... Of course, people still need to eat and sleep, so there are some forced safeguards, but... Oh well...