I also built my first computer back in the '70s, though I admit I didn't finish it. I'm a programmer who eventually got tired of programming something that I had no idea what was inside. I based my computer on a PDP8 bus that I had gotten from work, and used the 74181 bit slice ALU chip with the intent to build a 16-bit PDP-11 knockoff. I taped up a set of double-sided boards and etched them at home. No plated-through holes though - just wires soldered in to connect the two sides. I finally got stuck when I got to the proms that I needed to implement the microprogram. They and the equipment to burn them were too expensive. I built a great living-room ready box to put it all in too. The populated boards that I did finish sat in a card box for years until I could bring myself to throw them out (wife helped on that).

I would also like to see additional form factors, such as one the size of the old style deskpad (possibly even bigger, why not?) to actually replace my desktop computer. With Bluetooth, I should be able to use a mouse and keyboard if I am that backward. Plenty of room along the back edge for USB and other conventional i/o connectors as might be marketable. Also, not LCD, should be OLED on a reasonably (enough to stand up to moving from desk to desk) flexible plastic substrate, no glass. Otherwise, pretty much as you have described it so far would be fine with me.