Everyone does it. The only difference with Visio is that they were selling the data without you agreeing to it which is a privacy breach. Most companies just collect the data for future developments. For example, if there's a section on the smart TV that no one uses then they won't bother developing it further with future updates or future TV models. The other breach Visio had was that the data wasn't entirely anonymous while the data gathered by other TV companies is anonymous.
All technology companies do it, the only difference is that companies like Apple and Android allow you to choose if you want to provide data to help development (the thing you tick when you first set up your phone). Other companies require you to opt out, for example, Google. If you don't opt out of Google tracking then it tracks everything you do. Every website you visit, everything you search, every location you go to (if you have a device that can track google like an Android phone or if you use Google maps at all)
Of course it's also not sinister. Google use that information to personalise adverts. It's targeted advertising.