What is Boxee and how does it improve upon the media streamers that are out there already? My year old $100 Asus O!Play is awesome.. It handles all my dvd rips

What is Boxee and how does it improve upon the media streamers that are out there already? My year old $100 Asus O!Play is awesome.. It handles all my dvd rips and anything I download. There is soo much that could be done with it, Asus just forgot about it or dropped the ball.