That's why it excites me when I find people who are on the bleeding edge of some of these technologies, pushing them further. What they come with isn't always practical - a lot of proof of concepts - but it can help expand the minds of designers and engineers who do make practical things. Perhaps someone will see exactly what they've needed to get a project off the ground, but could never quite figure out.
Anyway, without further adieu:
Anyone know of any other great examples of envelope-pushers? I'd love to see them.