I understand the tape thing. I feel the same way. Some of us never had an MSX with disks, so, loading a disk on an MSX to me doesn't feel like using my old MSX. This is all about nostalgia 
Why always want a cassette? Just load it from disk .
because we can? It's quite cool:
. Board is a wee bit bigger than a floppy disk (10cm square).
Here goes:
i love the size. wanna make a 3d printed case for stuff like that. and then inc a real msx keybaord :D
Zett, official case will probably be 3D printed (but boards might be sold without it, too.)
The keyboard is in the plans for a future project 
Also, as requested by @hardwaremaker, the bottom layer side of the board:
Zett, official case will probably be 3D printed (but boards might be sold without it, too.)
The keyboard is in the plans for a future project
hmmm this board is realy intresting for me as a mod maker.
its a real nice small pcb and all on 2 sides. so its easy to make nice cases