Are you kidding?
EDIT: A Skype time-line:
http://skypeblogs.files.wordpress.com/2012/08/skype-timeline-v5-2.pdf
Vita version was before Microsoft acquisition.
According to the PDF you posted Vita has Skype after Microsoft acquired Skype. It is in the long term best interests of Skype that all network connected platforms have Skype.....Free.
Microsoft can provide features and better performance for Skype with software so while I expect Skype to be everywhere, the picture quality and features offered will be better on Microsoft partner platforms and the Xbox/Surface platforms.
As to the PS3, it has broken encryption keys and IPTV apps and Sony enterprise Apps force reboots to insure a clean "Root of Trust"OS. Vita (has a Trustzone cpu) got a GPU accelerated Browser update and the PS3 didn't. For the first time since the Vita release, the GTKwebkit2 APIs (both Vita and PS3 use the same APIs) were used in a Vita update but not in a PS3 update.
The PS3 is using Adobe Flash AVM+ for non commercial DASH IPTV. They can not use AVM+ for commercial DASH without paying a Fee. Sony announced nearly a year ago that they would use Playready DRM with a DASH player on their network connected platforms. PS3 low level is using OpenMax IL and then on top of that a AVM+ player. A few months ago Gstreamer 1.0 was released and it will now plug in to OpenMax IL.
DLNA, Video Chat and IPTV require a video player and should use a common player with extensions to support Variable bitrate (DASH). DLNA and Video Chat are overdue for updates and fixes. Commercial IPTV is supported with APPS that contain their own player that plugs into OpenMax IL; likely either Flash AVM+ or now Gstreamer.
Either nothing is coming or a major update to everything is coming and Sony is waiting to introduce it all at once. A 22nm PS3 refresh is coming and it will likely include a new encryption scheme based on ARM trustzone. Game side likely will remain the same but the APP or XMB for the PS3 would need to be rewritten and a break in PS3 firmware at that point. If it's coming this year then a FCC leak might happen around June and a major PS3 firmware update around Oct 2013.
Seems counter productive but along with a PS4 at $399 should be a PS3 at $149 with features that compare with the PS4. It's either that or you kill PS3 sales rather than get the new buyers that happen at the lower price point.
Skype isn't on PS3, and won't be on PS4, because it doesn't need it, they already have a video chat app. The only possible reason for it is on the rare occasions when you would be talking to someone who is using a different device. If your contact is on a PS3 or 4 then you use the inbuilt video chat app.
With the encoder chip I would hope that Sony can make it snappable to an in-game window without affecting resources. The live-share feature is proof that video info is streamable straight onto the network on an OS-level. Why you'd want to be visible while playing a game is beyond me, and the utter failure of all forms of video chat over the decades proves that its not something anyone feels comfortable enough to use on a casual basis.
The video chat app on the PS3 sucks eggs. It needs:
1) Video Noise correction for the camera which would reduce bandwidth needs
2) Dash variable bitrate to keep it from stuttering
3) A better codec to reduce bandwidth needs.
4) Automatic noise and echo cancelling (most of us don't know that you have to go into setting to set the echo canceling)
5) The ability to call outside the PSN Friends to other devices. That's not software, that requires a server that's updated when you go online and sign into PSN. It registers that you are on-line and the IP Address including port # behind your firewall. Google Talk and Skype both need the same thing. Beyond that it's just APIs and standards.
For Skype to work with Sony PSN registered platforms, the PSN server needs to talk to the Skype server and register the PSN users on line and how to get to them (IP Address and port).
