Indeed, Kepler covers only 0.25% of the sky, and is only capable of detecting systems that are edge-on (around 0.47% probability for Earth-like planets)[1].
The mind boggles at what we might discover with a more complete picture...
Well, it shouldn't boggle the mind too much, because 0.25% of the sky translates to factor of about 400 of what the Kepler mission has achieved. Multiply all the numbers of the mission by about 400.
I was thinking more along the lines of: instead of daydreaming about planets > 1000 ly away, we might find a system nearby that we can study in detail...