Hoagland was on C2C earlier, and he said basically what I thought.
They seem to have found liquid water on the surface (maybe in some kind of geyser mode).
But it's always been said that Mars was just too cold for liquid water, so this would make them change the way they are thinking totally.
If it's coming up in a geyser, then I guess it makes some sense. Subterranean water would not necessarily be the same temperature as the surface. Of course, it would likely either evaporate or freeze very quickly.
Personally, I think it's a waste to spend billions to see if microbial life exists on Mars. So what if it does? To me, that would not be all that surprising, nor would it be a very useful bit of information. I would be more interested in exploring exploitable resources.