There are three things at play here.
Apple sees the holes that allow jail breaking as security breaches. They WILL plug them. It's just a matter of when. Now that delta OTA updates are available, it's faster and easier to do so. You can say you don't need Apple, but you will simply die quietly when you can no longer update your device or connect to iCloud.
The developer community has been screaming forever about pirated software, and since all of the pirates jail break to enable this illegal activity, Apple is under constant pressure to plug this hole. They have not been overly helpful in the past, however they acknowledge it's a growing problem and have given us indications they will be more attentive in the future.
With syndicated content providers now demanding that their content be blocked on jail broken devices, this pressure continues to mount against Apple.
As a developer, I need a way to ensure I meet the contractual obligations of my client. That means I have to block access to modified devices whenever I deal with syndicated content. If Apple decides to include any applications on the device that stream syndicated content, they will be obligated to block this access as well... Do you see that in Apples future? Because I certainly do. It's a huge money maker and Apple would be foolish to let it slip by with only third party options available.
The Amazon Fire will include OS level lockouts that mean rooted devices will not function, and software installed outside the Amazon Fire App Store will lock up the device. They are doing this to protect the content providers. It's only a matter of time before Apple follows suit.