I would love to see a complete modern pc wrapped in a retro styled keyboard like this. With usb-c power and video output you could just plug it into a monitor with one cable.
Get a full-sized keyboard - a model M would work fine here - and a laptop with a broken screen plus some assorted bits and pieces. Fit the motherboard from the laptop in the keyboard after making the required openings in the keyboard enclosure. Hook up the power supply and a monitor and voilĂ , a keyboard PC.