Mirrorless may not be ready yet, but I can not see why a manufacturer would not push the technology forward until it is equivalent or better that DSLR's. The reason is for quality & cost reductions. The more you can drive towards replacing mechanical systems with electronics, the more you can drive your costs down and the quality issues tend to be reduced as well. As an example, if you can get the LCD viewfinder working on par with the DSLR, then you can eliminate a fair amount of precision injected and machined parts as well as high end glass for the mirror and prism. All those components tend to add more variability to the system than would mature electrical systems that would replace the mechanical systems. Additionally, as electrical systems mature, the costs continue to be driven down as better manufacturing methods and shear volume eliminate waste and variability. On the contrary, mechanical systems used today are already mature and new injection, machining, and glass production methods are not changing very rapidly (and therefore costs are stagnant or on the rise due to inflation). Electronics tend to defy inflation as they mature, and the quality will improve beyond the mechanical systems. So... are all the electronics ready to make the mirrorless change over yet? Probably not, but they probably will be some day in the near future.

Being a Mechanical Engineer (by background and training), it is sad to see one more mechanical system thrown in the scrap heap. However, I also understand that it is a sound business decision to do so, and will likely be a better long term path to drive improvements to the consumer faster than trying to keep the mechanical systems alive.

Pat