I've seen panels very much like these in Japan. They've been around for a couple of years. It may very well be the ones from Panasonic, but a quick glance at the Panasonic Japanese web page is inconclusive.

But in any case, the concept is already tested in the field. And in case you are wondering, it get's very hot where I live in the summer (40C is not unheard of). It would be interesting to see what they are doing to ensure airflow.