Light provides energy without waste or danger for all of nature, a process we are closer now to imitating. Let's just hope the timetable for the next discovery doesn't take another 100 years. We just don't have that kind of time.
I often feel that when an innovation is successful, I can't imagine life without it. I feel like that about many of the products and services from companies that made Fast Company's World's 50 Most Innovative Companies list.