Televisions weren’t always smart. In fact, given how long people tend to hang on to their TVs, plenty of so-called “boob tubes” still dominate numerous living rooms across the country. Fortunately, you don't need a smart TV to tune into Netflix and other streaming services. All you really need is a plug-in gadget—anything from a plug-in streaming stick to a set-top box shaped like a hockey puck to a full-fledged console.