Well think about it, would Sony really need to?

I mean they have been using and developing using Unix, Linux & source code for their own platforms for years.

The fact is Sony had helped develop the Android OS remember Android as a OS is from many companies adding to the source code, not just Google, its by many companies.

Sony could do exactly what Amazon did and fork The Android OS but make it playstation centric. Apk's & online store for the fork ,Hell they just may in fact do that.

But many times just because you fork Android really does not really mean much, because you really are not  closed off , the fact is an Apk is pretty much just another Apk.

Sony really does not need to make an OS because they have already invested into other OS's already to make one of their own if they wanted to.

Yeah, like when they advertised the possability to run YellowDogLinux on the PS3, only to remove said feature later on?

yes why not if it still supports Physical PS4 games it would make the OS superior to Windows Gaming in every aspect. They could allow at least the base PS4 games to run on it, the developers could choose to launch the game with scalable graphics settings or patch them latter.

Dual OS is no issue for me because i already have to deal with it duetto Windows incompatibilities to run older games even 8 years older games. Thats why i also still have XP, its really no rocket science to launch a second OS just press F8 while booting and then select the Harddrive where the OS is installed

And that is a very good reason to stick with windows OS, not problem there, but as pointed out Sony is also supporting an OS now outside of windows OS based.

Sony Sold off SOE, their PC arm, but in the case of Mobile they are investing more into chips and network structure to include AndroidOS so really , Windows OS is understandable not a priority platform for Sony, as for making an OS its not making a OS per say, but it is tweaking the OS to support PlayStation.

Anyhow, with the state of Windows now (Windows 10 really gets more frustrating the more I use it), they'd do better with cross platform support (GNU/Linux, Mac OSX, FreeBSD, heck, even Amiga OS4)

you havent read the OP he said that the OS would play all PS4 games. The PS4 libabry allready is bigger than Steam OS and has more interresting titles and exclusives than the entire Linux space imo. Most of the interesting titles on PC arent officially supported for Linux like Blizzards games.

Really? I am not so sure about that , Sony has one of the best version's of the AndroidOS running on their TV's and smartphone's.

So its not like they have very little experience in Operating systems like you are making it out to be.

No way

so why are you upgrading your PC to play console games when you could just buy a console for cheaper?

Agreed, Playstation VR is LiquidVR compatible, so Vulkan graphics Api is prevalent in now.

Android OS

LinuxOS's which Steam OS is one.

Apple has Metal

Microsoft has access to DirectX & Vulkan for Windows 10

So Sony's able to leverage a graphics Api on all but one above , Apples Metal all from Vulkan Api.

Since Linux and Android pretty much can run on anything, Hell even Microsoft's Windows 10 has a Android App player . Sony I think was wise to concentrate on AndroidOS.