All of these statements are false.

They are still the same OS, Apple is just rebranding the iPad OS as they have been adding exclusive features to iPad for years. Now they can communicate updates for each device more easily. It is just a bit of house cleaning. It will will make things simpler for consumers, developers, and Apple. 

This is in no way an indication that Sony's business model is good, and that working towards a company wide goal is a bad idea. Apple did not come out and say moving forward Macs will be running on Windows, and push the use of Windows Store over their own Music, TV, and Podcast services. That is exactly what Sony has been doing, while loosing massive amounts of market share, and Billions of dollars. 

Sony is wasting man power building things mutliple times, competing with themselves. 4K Ultra Streaming is competing with PlayStation Video. Crackle is competing with PlayStation Vue. PlayStation Store is competing with Google Play on Xperia and Bravia. The PlayStation Team is building an OS for Sony, while the Xperia and Bravia Teams are busy helping build Googles OS.

 Sony needs to do house cleaning just like Apple did. Zen 2 and Navi are perfectly suitable for Mobile as seen by Samsungs move to RDNA based graphics for their Mobile devices moving forward. If Sony moves their Mobile and TV products over to Ryzen and RDNA, they can move off Android, and share a common unified OS between PS5, Phone, and TV. Then all of Sony's OS teams can work together to create apps that work across all Sony products (of course with specific features suited to each device). All of their devices can be powered by the PlayStation Store allowing Sony to my consistant revenue off of all products beyond the point of sale. Additionally, they can open up access to PlayStation titles across all devices, allowing them to tap into their most valuable assets. All while pushing PlayStation Vue, PlayStation Video, PlayStation Now, and other Sony service, instead of pushing competitive services ahead of their own. 

Then, maybe, instead of selling 6.5 Million Google Phone's a year, and loosing $1 Billion, maybe they can sell 10 Million Sony Phone's and break even. Worse case scenario, they sell 6.5M Sony Phone's, and loose $1 Billion, but at least that billion is going to building up their own OS, Software, Networking, and Services.

Lol. "rebranding". Over the years iPadOS and iOS are going to diverge further and further and iPadOS and MacOS are going to converge more and more. You couldn't be more wrong about what apple is doing. They're going further and further away from universal operating systems and forcing developers to develop more versions of apps for apple devices, not less. This directly contradicts your claims.

No, see if Sony were to make their own phone OS, that would cost hundreds of millions, per year to build and maintain to compete against apple and google. Their OS would have to work just as good as chrome or iOS and have every single major app a user would expect to have from day one in order to have a prayer at even maintaining their market share.

It's far more likely that if Sony were to do what you suggest, instead of selling 6.5 million phones, they'll sell 1 million, and instead of losing $1 billion a year, they'd lose $2 billion-$3 billion. But hey, what's a little bit of decreased marketshare when you can pour millions into getting facebook to develop their own app for your device, and getting them to maintain it the same way they do for Google and Apple?

You further you go down this road, the more and more ridiculous this becomes.