The "Do it Yourself" idea has lately mutated into the overarching idea of "Make". There is a Make festival upcoming in California - see here for details. Old-time spirit meets innovation. A great marketing umbrella that hides its capitalism under a egalitarian guise. There must be a long German word for that.
The Make trend is on the web by instructables.com where one can learn to do just about anything. I learned how to make a booster for my wifi router dull girl that I am. I will issue a caution on viewing the site - one can get terribly lost looking at ridiculous things.
But, back to the Tate Modern. Philosophically, the legacy of 1960's performance and action-based artworks was a lean toward a utopian vision of experience that was self-created and free. It was anti-consumerist consumerism. And we are back there again.