Unless of course Canon decides that this is yet *another* good reason to launch a pellicle-mirror DSLR, without moving mirror. (my personal favorite argument is maximum silence, in particular when shutter recocking is delayed until finger is lifted from the release button ((S)CF on RT/1n/1n-RS, being analog cameras also delaying film- transport) (#12 in this list: http://www.a1.nl/phomepag/markerink/cf_eos1n.htm)
I think since the speed of the CMOS sensors is really good up to around ISO 1000 now, there is really no good reason NOT to make a pellicle mirrored DSLR. Nobody is going to miss the stop or so the pellicle viewing system is going to cause, although it might result in a dimmer finder. It is amazing how much camera shake results from mirror slap, especially in the shutter speed range traditionally just below hand-holdable. Combined with IS, it would make a LOT more shots possible with existing light.
I would greatly simplify the camera mechanics as well. You could conceivably integrate the mirror cage, shutter, screen and sensor into a single, dust-sealed interchangeable unit, which might mean upgradeable cameras.
Or they could hold the mirror in the upward position on an ordinary DSLR, and use the TFT-screen as for realtime video-viewing.
Any number of consumer digicams already do this (including my little Minolta Dimage Z1, which can record video with sound at 640x480 pixels!) Oddly enough, there *is* a swinging mirror inside that camera (Z1) to direct the output of the image generated by an internal TFT display to either an eyepiece, or a rear-mounted screen. Apparently the lens focuses (VERY quickly, I might add!) with the image formed on the CCD... there are no intervening mirrors or beamsplitters.
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