I wonder if they also increase the efficiency of running. Maybe the first marathon runner to break the 2-hour barrier will be wearing them. If the efficiency increase is significant, I could see it becoming common to wear for commuting to work. You could run longer distances with less wear on your body.
I feel like the running community would shun them, since it's technically an method of assistance. Besides, I bet for ultra-elite marathon runners, the bulk of the shoe would outweigh the benefits it provides. You're talking about people who wear super-light minimalist shoes because it gives them an advantage.
This is a paradox of runners and cyclists too. They use high-tech gear to make running easier - easier than a naked human can do it - but they refuse powered assistance. I don't understand why they make such a clear distinction between using gadgets to save power and using gadgets to provide more power. If it's about natural un-assisted ability, they shouldn't wear shoes either.