"In photography there is a reality so subtle that it becomes more real than reality."
-- Alfred Stieglitz
I think Canon and Nikon need to wake up pretty quickly to what Sony is doing with mirrorless cameras. If this thing had a traditional view finder (and I had $4,500 to spend on a camera) I'd be all over this.
At some point at this tech will filter down to a good mid range camera and at that point I think the DSLRs of old will be put out to pasture.