As predicted, the European Union has opened and in-depth investigation into the proposed acquisition of Fitbit by Google.
The E.U. is concerned over the potential "data advantage," and whether rivals will have a disadvantage, especially because of Google's dominance in other sectors, such as search, online advertising, android OS, etc.

Executive Vice-President Margrethe Vestager, responsible for competition policy, said: “The use of wearable devices by European consumers is expected to grow significantly in the coming years. This will go hand in hand with an exponential growth of data generated through these devices. This data provides key insights about the life and the health situation of the users of these devices. Our investigation aims to ensure that control by Google over data collected through wearable devices as a result of the transaction does not distort competition.”

[ec.europa.eu...]

Earlier story
E.U. May Investigate Google Takeover of Fitbit [webmasterworld.com]