Wow, I must be in a foul mood. That just sounded terrible, ha!

My point is that our definition of habitable is going to change dramatically as we get more information. My knee jerk reaction to the summary was how limiting the thinking was to narrow what was possible to a tiny fraction of what was out there. Our concept of lifeforms and "earth-like lifeforms" are distinctions of their own and I hope I'm around to see how they get applied to whatever is discovered.

"...the scientists running it are fully confident that it will find Earth-like planets in some star's habitable zone"

Good to see that we're keeping a nice and closed mind about any lifeforms that might be outside the box. Just because we're so stuck on the definition of life that works here on our planet doesn't mean we won't find a lifeform that completely redefines "habitable zone".