So I got this today. I approve. It has two video inputs, contrast, brightness, color, rotation, and audio controls (the descriptions says no audio input or output so I'll look into this) It also can be switched between 4

and 16:9. Resolution is good. N64 looks better on this (in 4

mode) than on the PSone screen imo. It looks a little bit stretched in 16:9 but it's not that bad. It's also quite small. I'll probably open it up later today or tomorrow. I'll post pics of it running, taken apart etc.
EDIT: WOW. The controller board for this is tiny. Here it is.
Sorry this one's a bit bad but you get the idea
Now here's the wow. There's a small daughter board for the tact switches on the bottom. There's also an empty connector on the bottom right of the board that might hold audio input and output. I've bought another one and I'll play around with it to try and do that, because built in audio controls is nice.