Oh yes in many respects the mirrorless switch is already done. I don't tend to buy new camera bodies though; my most recent purchase was a 1Ds MKIII from ~10 years ago, as I want the build quality/weather-resistance you get from those pro models. I'm really excited to see what a pro mirrorless camera might look like in a few years (Canon only just released the 1Dx MkIII so it's not arriving just yet).

The switch is quite obvious from the Canon release schedule - I don't think they have a single non-RF (mirrorless mount) lens being released this year.