A:AnswerThe picture quality will be a lot better if you upgrade to the 4k. Your tv may already up convert to 4k, but you will definitely notice a big improvement if you upgrade your Apple TV.
A:AnswerThere should be an optical out, and if not apple might have just gone wireless. I have my HomePod connected to my Apple TV over wifi and Bluetooth.
A:AnswerYes - there is a Spectrum app that works on Apple TV. I used to have Spectrum and used this app and it worked well. I subsequently "cut the cord" and no longer have Spectrum TV.
A:AnswerI had the same issue except I wanted to stream AMC + on my Samsung TV through my IPhone to watch the walking dead. My Samsung model does not have the Apple smart cast feature so it wouldn’t cast. I decided to buy an Apple TV so it works now because your casting to the Apple TV which is connected to your TV. The biggest decision is it worth the $200 cost to have this feature.
A:AnswerYes with a Apple TV you can use airplay to connect your iPad too your TV. Also you need a HDMI connection on your tv to work with Apple TV. You can also download the spectrum app and watch TV that way.