Below is a link to a very powerful example of how "hi-tech" can, and will, make "low-tech" available to the masses. While Marcin didn't mention it, this type of project is even more potentially impactful if you consider blending in the ever increasing capabilities of 3-D printing that would enable open-source designs to include more sophisticated elements/parts.
Once again the myth that advanced technologies only benefit the already wealthy and/or only increase the competitive advantage of already technologically developed societies is dispelled. There will likely always be a gap between the most advanced countries, and the least, but the real measure of progress will be in how that gap will narrow and how quickly the advances in the front of the innovation wave are transmitted to the back. Further, as information is more widely dispersed, and more people share their discoveries and insights, it is unlikely that the front of the innovation wave for any given technology will be lead by the same limited set of countries that dominate science/technology today, nor that the leadership will remain as stable as it tends to be today. As the competitive landscape becomes more dynamic and vibrant, it will generate greater, if not wholly unexpected, levels of global prosperity. The progress will be permanent and pervasive, but the source will be highly fluid and seemingly "spontaneous" from unexpected corners of the globe.
Marcin Jakubowski: Open-sourced blueprints for civilization Video on TED.com