and when they eventually make their way to the pro level cameras they are solid.
Well, atm you need a 3rd party hack to bypass the internal processing and create video material that's at least somewhere near of what's expected for HD work, i.e. won't get you reprimanded for technical quality by content management.
Same goes for the idea that it will still take some time for 4K to take of. It takes just as much time to get a project to be shown on those screens to go through the complete production process.
Pro level solidity sounds nice, but in the end Canon cooks just with water, as everybody else - from the POV of someone working in a heterogeneous environment, of course.