> and the general aim is to induce deep relaxation.
Certainly a step in the right direction, but IMO still way below the technology's true potential. Imagine a machine that you just put on your head (I'm not sure how big the total device would have to be, and how much energy it would need etc., but even a static version would have great marketing potential) that gives you instant, safe pleasure like you've never felt before. Resistance is futile -- you will be pleasured, guaranteed. The ultimate form of entertainment; you could look at a grey wall and still be amused (but to make the experience more natural one could watch a movie or listen to music for example). This kind of stuff was so far only possible with dangerous (often illegal) and unreliable chemicals.
And this is just the pure hedonism part; other settings could for example help you to achieve "deep thoughtful concentration" (great for work and study) or "super relaxation" (great against all kinds of stress). How about using a relaxing or pleasure setting during operations, or to relieve any kind of chronic or acute pain. There is a world of possible applications out there right for the taking. If there ever was a product that's virtually guaranteed to sell then this must be it.
Now, can anyone tell me: why on earth isn't this product on the market yet? Are there technical problems, or is everyone just missing a great opportunity here? I mean, one could get richer than Bill Gates by making a product that will virtually sell *itself*, and no doubt will change society quite a bit in the process.
FYI, for those that didn't follow this thread on the extropians list, here's a link to bring you up to speed, courtesy of Ian Goddard.