Pumpkin910 wrote: ↑ Sorry for the dumb question but do I need one of these if I already have a Samsung dongle in my Samsung TV? Sorry for the dumb question but do I need one of these if I already have a Samsung dongle in my Samsung TV?

Most likely that would be a WiFi dongle to let you connect the Samsung apps in your smart TV to the internet via your WiFi router.Samsung has a decent app store that supports the most common streaming apps. You'd probably find that the Chromecast wouldn't add much for you, unless you need screen mirroring from your Android devices or your PCs. I occasionally find it handy for the screen mirroring when there's just no other way to get the content I want to view onto the TV (although the performance with screen mirroring is not always great).