I've had a post sitting in the comments box for the last month about my feeling that Sky were going to pull out of domestic Rugby Union coverage, but it was all just guesswork.
It was pretty clear to me that the Pro12/14 contact wasn't their priority, rather they were using it to build their portfolio to win the european contract outright . If it was a priority they would have hired a main commentary ran that wasn't Stuart Barnes and Miles Harrison. My guess is that they'll keep a hold of Super Rugby as it fills in a hole in the schedule during the weekend which would normally be empty.
The question now is whether Sky feel that international rugby alone is enough to draw in subscribers. A few years ago, the answer would have been no. But now that NOWtv has really taken off it may still be worthwhile.
Purely personal view, but it's their international rugby that keeps me subscribing. I get a decent enough offer from Virgin that it's worth keeping Sky Cinema & Sports on my account permanently rather than dipping in during international rugby seasons, but if Sanzar (and the summer tours with it) went I'd quite seriously reconsider that.