Originally Posted by FotoPete 
why would they elminate the mirror box and pentamirror/prism combo? Not only would I imagine it to be more costly (more electronics and another sensor) but the battery drain will be noticeably faster.
why remove mirror box? look to rangefinders. The lens can be placed closer to the sensor and allows much more compact lenses, such as fast wide-angles with less distortion and what not. However, like in the leica m8, you then hve to bend the sensor, which is apparently costs 5000$.