I don’t know that its absolutely needed (probably not) but getting the new Picade X USB C hat might be worth while. That will let you use a 3A USB C Pi 4 power supply instead of the 2.5A one. Something to consider if you haven’t ordered your Pi 4B yet.
I’m thinking, you’ll likely need a new monitor cable or adapter to plug into the Micro HDMI on the Pi 4B.
Heat given off by the Pi 4B will be an issue. If it gets hot enough it will throttle back to keep from overheating. That will hurt its performance negating the advantage of having it. I would try to mount a fan someplace to blow air between the Pi and Picade Hat. There are few threads on this that you could likely find with a forum search.