SageTV is dead, I'm afraid. The team is likely working on GoogleTV, but I kind of think Google is done with that segment. Online streaming is their thing, and it's the future of TV anyway.
SageTV actually isn't totally dead as it is the PVR component of the Google Fiber project - the info screens even show it as SageTV version 8. But that is only of use to people in parts of Kansas City so far.
As long as Google Fiber is offering traditional TV services similar to CableTV then Google is still somewhat operating in that segment. But it is not clear if they ever will decide to get serious and significantly ramp up their Google Fiber efforts. At their current pace it will take them a few hundred years to roll this out across the US, never mind Canada.