Oh, I figure it's the sort of thing which might take time to catch on and be developed, in places with less abundant cheap labor but also less ambient lighting where the extra 10% or so efficiency is important. Not soon within the TL, but something within the next few decades--I'm less "this is something which needs to happen faster" and more along the lines of this being a method to incidentally later advance true photovoltaic. It's something which might happen by the , but which might move up the commercialization of photovoltaics, since this gives their development a benefit of automation and production improvements to the by-then-long-proven solar thermal systems. They might only initially be a few percent efficient, but they can still provide the limited power needed to steer a larger solar boiler/concentrator (or to steer a system which provides control signals for a higher-power steering system).It is always tempting to write the most efficient solution as soon as available, but one has to consider the storytelling and human aspect of it. Ideas take time to coalesce. In the meantime, people will experiment with less efficient and more complicated solutions.