Blu-Ray rippers are the tool to use if you are looking to get your Blu-Ray movie content onto your hard drive.  Once the disc is ripped then you can either convert it to HD video, convert Blu Ray to iPad video, or convert it to other formats that your portable gadgets would support.  Playback HD quality movies on your iPod, iPad, iPhone, Xoom, tablet PC, or store them on your media center for a collection of movies in your digital library.