Though depending on how retro you wanted to be that could also be greatly simplified. Change the video to HDMI which can also carry the audio and you'd negate most of that daughterboard.
Yeah, that's what I was thinking. I mean, in the interest of historical perspective and depending on what you plan on doing with it, you could go retro and try to have the board looking as close to the original as possible. That'd be great for a museum that has older computers, and to have them functioning would be the cherry on top. . But for personal purposes, the more compact would probably be more useful.
In other news, I got a new phone on Sunday. Not a Samsung, not a Motorola, but a TCL 10 Pro. The build quality is excellent, it's sleek and fast and I've seen reviews directly comparing it to the iPhone SE released last year. It's quite a bang for the buck. Only paying $10 a month for it on top of my regular bill.