As far as I understand the Microsoft-Band can already measure the amount of UV radiation a person perceives. If we are lucky that will become the standard for smart watches and we will get a lot of new data about sun exposure.

That could be huge. It would be interesting if the gov could fund research by something more like kaggle, where they collect a mountain of data, and then they outsource the construction of models that best predict health outcomes. We need to move past simplistic statistics and meta-analysis.