I switched to Xfinity for my Internet and home phone about 4 years ago, and have never regretted it. CenturyLink could only offer me 100 Mbps DSL, and their service level had been deteriorating for a number of years. After four separate outages within about a six month span, I was fed up. Without moving to satellite (and Starlink wasn't really an option then) Xfinity was my only other choice. I was hesitant after having their TV service years ago (under a different company that was bought out by Comcast), but I was pleasantly surprised with it all. I started with 600 MBps for less than I was paying for DSL, and it's since been bumped to 900 (but real world I get Gigabit speeds) for the same price. The only outages I've had were with a large area power failure after a storm, and I would have lost DSL under the same conditions. I had issues trying to control my modem settings (Comcast locks some of the settings) so I just put the modem in bridge mode and use my own router instead.
Obviously, you need an Internet connection to stream. If you use a phone hotspot to connect to the Internet, then no there's no additional hardware necessary. But if you're looking for TV service without subscribing to something like Fubo, Sling, or YouTube TV, then you need an outside antenna and be within the reception area for your local stations. Of course, that still don't give you many of the offerings that cable TV has, although the companies I mentioned above can provide them.
