The
idea of virtual reality has been around for decades. You put on a
pair of goggles, and suddenly you find yourself immersed in a
computer-generated 3D world. Technology has been slow at bringing
this idea to fruition, but this is an area where we can be very
confident that spectacular progress will be made. There are
absolutely no theoretical roadblocks to creating an extremely vivid
3D landscape that you can view with virtual reality goggles. Making virtual
reality a household reality is just a matter of making more progress
in visualization technology that has been progressing at a high rate
of progress for decades. No doubt within twenty years, you will be able
to have spectacular virtual reality experiences at a reasonable cost.
But
what about interacting with the 3D world you see while wearing the virtual
reality goggles? It will be hard for an interface to allow seamless
interactions. Someone wearing virtual reality goggles may be able to manipulate a
controller with his hands, maybe something like a video controller.
But this creates a kind of imperfect blend. You are using your hands
(which you cannot see with the goggles on) to interact with the world
you view while wearing the goggles. And what if you want to
interact with the virtual world or its inhabitants in a way that the
simple controller doesn't allow? For example, in the virtual world
you might want to kiss a character on the cheek, but your simple
controller may offer no way to do that.
Another
idea for interacting with a computer-generated reality is an idea
advanced on the TV show Star Trek: The Next Generation: the
idea of a holodeck. The idea is that you go into some special room
where there are very sophisticated holographic projectors. All of
the walls, the ceiling, and the floor of the holodeck are involved in
the holographic projection. So after entering such a room, you might
suddenly find yourself seeing just what someone would see at the Grand Canyon. You look all
around, and everything looks just as it would if you were in the
Grand Canyon, even at your feet. You may also interact with what
looks like other people, but these too are just holographic
projections. There is no need to wear any special goggles.
The
basic idea of a holodeck seems technically feasible, although in both
Star Trek: The Next Generation and
Star Trek: Voyager, the
idea was stretched to what
seemed like unrealistic extremes, as we would see people using the
holodeck sitting on holographic chairs and lying on holographic beds.
It would seem that a holographic projection would offer no such
solidity.
The
main drawback of a holograph is that it isn't a “use around the
house” kind of thing, requiring a large expensive room capable of
sophisticated holographic projection. Another drawback is that a
holodeck seems unsuitable for a simulation in which you are walking
around for long distances, such as a simulation in which you are
walking around on the streets of a city.
But
there's another idea for how future humans could experience something
like virtual reality, an idea rarely considered. The idea is to
somehow upgrade human imagination. If human imagination were somehow
to be expanded far beyond its current limits, then people might have
within their own minds something that would be better than virtual
reality or a holodeck.
Consider
the human imagination. Any one of us can conjure up a “movie in
our minds,” in which we can imagine anything we can please. But
what we see in our mind's eye when we daydream is kind of pale, dim,
and shadowy, without many details. But imagine if that “movie in
our minds” could somehow become as detailed and vivid and life-like
as a widescreen IMAX movie. And imagine if we could fill in endless
imaginative details effortlessly.
Such
a thing might be possible in the future, given some imagination
upgrade in the human mind that might be achieved through technology,
neural implants, drugs, or genetic enhancements. After such an upgrade, you might
have no need for VR goggles or a holodeck. You could simply close
your eyes and see in your mind's eye something that might be as vivid
as virtual reality or a modern video game on a wide-screen TV. And
you could shape that very-vivid reality effortlessly, just by
imagining something different. In your mind's eye you could move
from one city to another effortlessly, or from one planet to another
planet, seeing each one as vividly as if you were watching
a wide-screen movie. A hundred vivid details might flow into such
scenes, flowing effortlessly from the wellsprings of your enhanced
imagination.
It
might be dangerous to make such an imagination upgrade a permanent
part of the human mind. For with such an imagination, prisons would
not be such a deterrent. Every prisoner would know that from his jail
cell he could have something as enjoyable as trips to a thousand
Disney Worlds, just by closing his eyes and letting his imagination
gush forth.
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