Personally, I think d-SLR days are numbered. SLR technology was developed as a way to see what the camera sees TTL. It is a problem unique to film. Digital has no such problem, it can show you what is on the sensor via lcd. Design efficiency will eventually replace mirror systems with electronic viewfinders as EVs get better. d-SLRs are a bridge between the film past and the digital future. You can already see that mirrors get in the way of video. The only value d-SLRs have is in the legacy lens systems that film users had and a working interface that was familiar to a large market of users.
EVIL is the future of image capture (notice, I don't say photography).