The Google project only help people to find the most suitable place to install Solar panels and the 21 Inc tech would only have a small influence on the decentralization of the network, but no real profit for the people
investing in it. As the total hashing power goes up, with the addition of these devices on a grand scale, these devices will yield very little profit. It's more of a Geek Gadget than anything else.
I will invest in some to support the Bitcoin network, but I guess a ROI would not be in my future with that investment.