i usually step only in the center of squares anyway, so for me this would be perfect. =)
IMO the govt needs to quit subsidizing corporate energy, which is "necessary" because we "need energy," and start subsidizing small-scale, localized energy production. putting solar panels on your house should be an investment, not an expense (look at Germany) and putting these tiles should be the same. the government needs to subsidize the PEOPLE making electricity, not the big corporations.