I'll be honest and say I feel like this is a waste of resources in that it caters to some super small niche. Sony has s lot of things to work on besides this to make their OS and ecosystem better.
It's not that much work. HTML5 W3C extensions already support most of what is needed. This has been in the works for Media and games for the entire CE industry. It's part of Vidipath and known since June 2011 when Sony chose Playready DRM when it became the DTLA's choice for DTCP-IP.
If you read the goals for the W3C's RTC (Real Time Chat) it includes extremely low latency video streaming which is critical for game streaming but not so much for Video Chat. The same hardware and software stack used for Media streaming is also used for Game streaming and vice versa.
The Roadmap both Sony and Microsoft are following is complicated. It has to include the ability of the Internet to support Game streaming and the state of HTML5 browsers and APP frameworks.
Why does this matter for game streaming? Cable companies have a roadmap to support UHD TV and that requires a faster internet with lower latency which can also support game streaming and Playstation Vue. If ATSC 3 is being supported earlier then the Cable industry has to speed up their support for UHD IPTV.
From recent news articles, the FCC auction of some of the TV frequencies is going to push up the timetable for ATSC 3.0. ATSC 2.0 has been delayed and since most TVs will need a new STB for ATSC 2.0 and a new STB and Tuner for ATSC 3.0, the industry may wait and support just ATSC 3.0 three years early by 2017. The STBs must include HTML5 and HEVC and a USB or Network tuner must support the new standard. Just about every new STB being released including the XB1 (confirmed) and PS4 (speculated) already support HEVC.
Sony is moving to services and Gaming Social media as eventually PCs will replace the Game Console. Embedded DRM, power efficiency (Quiet cooling) and low price are coming to PCs after 2017. Microsoft with Windows 10 has already moved to the service model which signals a massive increase in the number of PCs in homes AS does Microsoft providing Playready servers FREE of charge since the beginning of 2015. A 2016 (Skylake or Carrizo) Windows 10 PC with OEM hardware can support UHD blu-ray with digital bridge and DVR for Cable, ATSC 2 and 3. It can support Playready ND for streaming media in the home.
In the short term a XB1 and PS4 can perform the same functions (next 4+ years) and I expect the sales of PS4 and XB1 to massively increase later in 2016.
Sony in the near future will support PS1, PS2 and PS4 game streaming from PS4s and PS3 streaming from Playstation Now to CE platforms (including PCs) in the home. Microsoft will support Xbox 360 and XB1 game streaming to CE platforms in the home from the XB1 and eventually from PCs.