First of all, Apple isn't PULLING apps now that the Apple Watch is released. The Pebble app is still there, and you can still use it. This whole uproar is about a single developer who had his app denied by a specific reviewer at Apple for a basic breach of their terms and conditions for putting Apps on the App Store. The general consensus seems to be that a simple rewording (maybe not even having to remove the word 'Pebble') is all that he needs.
Also, a theater buying a TV/Radio station and not allowing competing theaters to run ads is perfectly acceptable and realistic.
Overall, I'm failing to see your point. Not to be a broken record, but these are competing businesses. It doesn't really matter if you s/Apple/Amazon|Google/g and s/Pebble/Netflix|Roku/g, all you're really arguing is that a company doesn't have a right to control a marketplace that they OWN.
I get that choice is great for the consumer, and I totally agree. It's absolutely best to have the ability to choose the devices you want, have them interconnect, and to be able to run the software that you want on them. I also think there should be no war or crime, and that the 1%'s money should be spread out evenly over the population. I (shockingly) think that no one should treat ANYONE unfairly. Unfortunately, we don't live in that world.
As long as we allow competition between businesses, they are going to, well, compete. Just because one gets very large and popular doesn't suddenly mean the rules have to change for it.