One of those things where GPU powered seems odd at first but actually makes a lot of sense. Means you can work with more than just the final outputs but can link in a lot deeper on the overall pipeline. Very cool.
Will probably be the first of many emulators to come.
A bit odd they are using Unity but I guess that gets them multi platform easily. Would be nice if they went something a bit more open like Godot but sometime you have to be pragmatic not ideal.