For a monitor, the last thing you want is post processing in the controller - that just degrades image quality while adding significant input lag. Monitor controllers should be quite barebones: decoding the signal and sending it to the panel with adjustments for the output in terms of color balance, contrast, brightness, and ideally gamma and 3D LUT support for advanced calibration. None of that is post processing though, just adjustments to how the controller interprets the display signal, and typically handled in real time or as close as makes no difference. Post processing would typically entail things like noise reduction, various filters, motion smoothing, AA, fake HDR effects, advanced upscaling, etc. - the type of things TVs do that make them poor monitors.
A nice, slim, semi-universal monitor casing without overly fat bezels would be nice, though I imagine it would be difficult to pull off due to differing mounting points and different panel thicknesses, different locations for cables coming out of the panel, and so on. Nonetheless I think the available solutions are both too bulky and expensive, so I look forward to any efforts to improve upon them.