I have it and was not ‘rolled out’ I just done it myself. You need an unlimited internet usage account (dont think it has to be with sky?) and a Sky HD box. I am on Sky with telephone, TV and Broadband so all ok for me. I just nipped to tesco bought a £6 ethernet cable, one end in the router and one in the back of the HD box and I was away. You can download and stream programmes as you go. The Anytime + Icon appears at the top next to the planner, TV Guide etc….
You can wait for Sky to roll out or get a sky chap to come and charge you £60 (no shit!) or can do it in 5 minutes and your own ethernet cable. There’s a free video of how to do on the Sky website.
Some good programmes on there and worth it for free effectively as long as you have an unlimited Broadband account/ tariff