A planet with two suns has always been a popular science fiction idea, but up till now evidence of these planets has been quite limited. There have been cases where a planet does have two suns during a stellar eclipse. There has been no other case where astronomers have gained direct evidence of a planet with two suns by observing its planetary transit (a miniature eclipse as a planet passes by a star.) Detecting this transit has made this discovery mush more creditable and gives more precise measurements of the planet.
I think this discovery is very interesting, its science fiction come to life. Its amazing what we can see in space now. Could you imagine going to watch the sunset and see two suns going below the horizon?