This may be a technical point, but I think your use of the word "developing" in the title is out of place.
I work in the software development department of a large firm, and a patent application like this would not be considered evidence of any "development" here. "Design", maybe; even that would be a bit too strong.
"Development" would imply that Apple really has actual architects, designers, and programmers working on actual software versions of these patents. All that's evident from these applications is that someone at Apple is at least brainstorming these ideas and exploring them as possible projects. They MAY already have this software running on AppleTVs in the lab (thought I doubt it) but the patent application doesn't imply any kind of "Development".
I'm pointing this out because when I first saw your headline, I thought you had news about Apple hiring developers for this project, or inside info from employees working on it.
Good catch, and I agree completely. This is just a patent application and it's no evidence that this technology may actually be under development. But the idea is cool nonetheless.