Another user asked about this on a DSTV forum yesterday. This was the representative's response:
"As we've said, we will confirm on here when we are ready. This is why we are always so reluctant to give you specific dates - as things do move out. Let's rather say that you will have access to this in the first quarter of our financial year eg between April and end of June 2017."
So I finally got my Chromecast Gen2 setup this evening and it is working perfectly for Live TV. As soon as I select catch up content it starts playing for about 5 seconds and then stops, giving me some message about a problem with the title. Anyone else experienced this? Casting from a Nexus 6 on 7.1.1 to a Samsung Smart TV.