Yeah, I have seen MIPI-DSI based displays for use with both HDMI and eDP/Displayport converters. You just have to make sure the converter supports the right number of "lanes" to handle the display's resolution and refresh rate. I guess I'd have to get a separate capacitive touch panel that had exactly the same usable detection area as the display's active display area and make sure that I had them lined up perfectly. It would be an awful lot of trouble when some company somewhere could easily set up machinery to do the job quickly and easily and make loads of profit.
I would think putting together a 7 or 10 inch 1080p or 1440p display and a matching 10-point multitouch panel (or, if you don't want to source a tablet touch panel, just go with a 5.6 inch 1440p display and touch panel from one of the ubiquitous flagship Android phablets like the LG V10 or Samsung Note series phones) would make bank. Oh well, I guess I can dream, anyway.