The announcement regarding the new GoGo IFE product onboard the 753 was made Oct. 5, 2011.
Entertainment On Demand
Now you’ll be able to browse and stream TV and movies using in-flight Wi-Fi, all without purchasing a Gogo pass! Plus, everything you rent in-flight will still be available for you to watch at least 24 hours after your flight lands.
This feature will be available on all 16 of our Boeing 757-300 aircraft to start, and available at an introductory price for TV ($.99) and movies ($3.99). Entertainment on demand will be available for laptops and expanded to tablet and mobile devices by early 2012 on 757-300s.
I do not recall (nor have I been able to find now by searching) and news on this feature since that date.