This is dog slow, you can't even stream Youtube at 4K resolution with that. Downloading a reasonably recent game would also take close to an entire day. Not everyone needs a full symmetric Gbps perhaps, but 100Mbps is kind of a baseline nowadays, and more is better for faster downloads.
Not something I care about.
I don't have a 4K TV. I'm not sure if I've ever seen a 4K TV. I've definitely seen a very high-resolution TV at a friend's house, and it was kind of cool, but not something interesting enough to motivate me to spend $500 or $20/month to acquire one of my own.
I hardly watch TV. My TV has a native resolution of 720p, I think, and 720p videos look really high-quality to me on the occasions when I watch.