The popularity of Gold is based, in part, upon scarcity. Given the cost of mining Gold, supply and demand, we have the emotional aspect which has been driving the price of the precious metal up.
But, what if Gold could be "mined" at much cheaper prices? What would that do to Gold?
Clearly, it would drive the price of Gold lower.
Thermopower will be able to "mine" Gold at extremely cheap prices in the future by using an electrolysis technique to extract Gold.
If you're a long term Gold investor, don't expect to get rich. Gold is an insurance policy. Treat the cost of Gold as a cost of doing business. The premium you pay for Gold may be lost in the future when Thermopower becomes available to the public.