At this time, I think it is way overstated that we are anywhere near close to having TV over the internet become a threat to SAT or CABLE, or that many people are willing to watch TV over the Internet. The reasons are varied.
1. I have DSL. It costs me $24 a month. Fast enough for me for surfing the internet, downloading most files, even watching the occasional TV show from Hulu.
To actually watch a TV program in HD, I would need to upgrade to Cable Internet, and in my area that cost is around $55+. So before I pay for TV services, I am paying something like $350 more a year. If I get my TV service from the Cable provider it would be lower, but going back to crapcable is not an option. Also if it is in competition with the cable company, just how much do you think they will charge another provider to use their lines? Is someone like Dish going to string their own lines?
2. There are still many areas of the country that do not have Cable Internet access for that kind of speed.
3. My DSL is actually quite reliable. Cable Internet much less so. I would be back to losing TV everytime there was a storm with wires down, or a car into a pole, etc..... One of the best things about Dish over the many many years I have had it is the reliability.
4. When it is feasible and should it become more popular, don't fool yourself. There will charges you never thought of, and I can almost guarantee the era of unlimited Internet will become extinct, or very pricey.
5. Thing we take for granted as free, such as Hulu will probably no longer be free.
Sure, to save money there are some students, and I'm sure others that get by with watching programs from the internet either free, or using Netflix for example. In hard times maybe even some families. The percentage is tiny however of those that rely solely on that or that never go back to SAT or CABLE eventually.