Stupid solar / good solar

Why would anyone have ever taken solar cells embedded in roads seriously?   The problems are obvious - and are set out in this article about a couple of tests of the concept that gave very underwhelming results.

On the other hand, why is no one in Australia talking about floating solar on our dams and lakes? :

....installing Solar PV system on water bodies like oceans, lakes, lagoons, reservoir, irrigation ponds, waste water treatment plants, wineries, fish farms, dams and canals can be an attractive option. Floating type solar photovoltaic panels have numerous advantages compared to overland installed solar panels, including fewer obstacles to block sunlight , convenient, energy efficiency, higher power generation efficiency owing to its lower temperature underneath the panels . Additionally, the aquatic environment profits by the solar installation because the shading of the plant prevents excessive water evaporation, limits algae growth and potentially improving water quality.
Floating photo voltaic power plant:A review | Request PDF. Available from: https://www.researchgate.net/publication/307540858_Floating_photo_voltaic_power_plantA_review [accessed Sep 25 2018].