I have about 400% more trust of Microsoft and Sony than I do of random smart tv manufacturers. I also have a fairly high degree of confidence that the xbox one and PS4 software will remain up to date with security patches, and address critical issues quickly. I have no confidence for TVs.
Microsoft and Sony have teams of lawyers who've drafted the data collection/data sharing/opt-out policies for what their current generation game consoles track and phone home about. I've seen entirely too many reports of "smart" TVs that start reporting your entire viewing habits, and/or displaying unwanted ads.
Use the TV as a dumb display and hook it up to a PS4, Xbox One, and/or home theatre PC.