Expect Canon to 'drag its feet', in upping video resolution. Higher video resolution is driven by marketing hype, and not practical need.
Very few of us have a 6 story IMAX theater in our homes. Even with 70" screen and standard viewing distances there is no noticeable difference to increasing the on screen resolution. You simply sit too far away when watching it to see a difference. Yes, if you are two feet away you can see a difference, but, you don't watch a movie on a 70" screen from two feet away.
Just like Canon was 'stuck' at 18 megapixels for its still photos. It wasn't that they couldn't produce higher megapixel cameras, it was that there was little to no practical benefit to doing so. It was only when marketing hype, evolved into marketing pressure that Canon was finally forced to up their megapixels. Not because the user received any benefit from them doing so, but, because the user had been 'brainwashed'' by other companies marketing into believing they needed it.
So will be the case with Canon and higher video resolutions.
Again, he wants resolutions in between the resolutions the camera supplies, not better.
"QHD (Quad HD), WQHD (Wide Quad HD),[or 1440p,is a display resolution of 2560x1440 pixels in a 16:9 aspect ratio."
Actually, the OP is looking for a video resolution format that is beyond what the camera can perform. It is not a standard video format, at all. It is a screen resolution mostly found in portable devices, such as "Galaxy" smart devices.