I think that audio and video over the internet in the sense of teleconferencing and telephone calls. Maybe we'll actually have picture phone through your work station. ↗
If you're in charge of managing domain name space you should treat everybody who asks for a registration the same. Whatever that is - whether it's nice or ugly or whatever - just be fair, treat them all the same. ↗
One of the things that is not so good is that a decision was made long ago about the size of an IP address - 32 bits. At the time it was a number much larger than anyone could imagine ever having that many computers but it turned out to be to small. ↗
TCP works very hard to get the data delivered in order without errors and does retransmissions and recoveries and all that kind of stuff which is exactly what you want in a file transfer because so you don't want any errors in your file. ↗