Tech new / Sony translucent mirror

Here is a video of the new Sony DSLR able to shoot 10fps cause the mirror does not move and able to see the what you are shooting without blacking out the screen. Its quite cool new tech for DSLR or a return tech cause Canon researched or already had a camera with this technology but never set a big trend cause you loose allot of light entering the sensor, but with nowadays high ISO doesn't really matter anymore and especially during bright sunny days might be great too. Have to say 10fps is crazy fast and hope this tech comes to other brands too especially to Canon cause mostly I already have a big range of lenses for Canon and would not like to change brands.

Check out the review of a55 here, however its Japanese but you can see sample pictures and videos.