I agree with much of the praise that is showered upon McLuhan-- he wrote way before his time, predicted much of what actually came to pass in the advances in media and technology, and (for the most part) has a cohesive and understandable book here. However, I find myself harping on little things here and there. I'm with
Courtney on the whole lightbulb thing, because I honestly feel like you can apply this overstretched theory to pretty much anything. I took a look over at TIME's 50
best inventions of 2009 to try and prove a point, and I don't know that it worked. Many of the inventions like the content-less
Spiderweb Silk and
Electric Eye correspond with his theory, both providing a new environment (incredibly durable silk that will have a plethora of uses and vision for people who previously would have no hopes of ever seeing anything ever), and their uses will probably be symmetric across all societies. But what if they aren't? In the case of
Teleportation (and how the hell is that not #1??), everyone has their own ideas of how the item should be used. Military uses, personal uses for convenience in moving around, super fast/safe computers-- the possibilities are endless. And honestly, I think it makes a huge difference in what society you are in, as the world stresses different aspects of life depending on the region. While the light bulb has no content, its purpose is plain and simple. Something like moving atoms from point a to point b is very muddled, but clearly creates its own space. I think what that space is depends entirely on the use.
I tend to link the use of a content-less invention to the content of a form of media in that I think the content can definitely have varying impacts on different societies. Plato and his homeboys wanted nothing to do with the written word, fearing that it would cause the breakdown of society. However, Plato did say that the medium had value solely for singing songs of praise. If Aristotle and the other nonbelievers shrugged and went along with what Plato said, and the written medium never amounted to more than just songs praising heroes, politicians, rhetoricians, etc., do you honestly think that the effect would be the same? We have propaganda, information, fictional stories, biographies, songs lamenting people instead. I think content obviously matters. Sorry for taking so long to post this.